One thing I wish to discuss here however, is what sort of reboot this will be, a "hard reboot", where everything is reset and nothing from the past decade is canon in that universe, or a "soft reboot", where things will be set in the same universe we've been experiencing, but following a new storyline. Personally, I wouldn't mind it either way, whilst a new universe would be a nice and refreshing take on the G1 comics, I would also be a little sad to leave out current universe, but a clean slate could be worth it for fresh storylines and character arcs.
Regardless of which type of reboot we get, I'm sure I'll be happy, and we still have at least 10 months left with the current loads. So before I discuss how I think this universe could end, let's look at the current lines:
Rom and the Micronauts is the (apparent) finale crossover for Rom and the Micronauts (duh) it's currently just a standard crossover story with characters from both series interacting and experiencing each other's worlds.
I believe the series will end with Baron Karza betraying the Dire Wraiths, killing their leaders and The Presence (their god), leading to Rom and the Micronauts fighting him and finally killing/defeating him, maybe with help from the currently absent Oz, leading to both series coming to a satisfying conclusion.
I've already talked enough about what Scarlett's Strike Force is, but the basic information is that it was originally planned as a continuation of GI Joe and MASK, which later just dropped the MASK aspect, except for Matt Trakker's involvement.
Due to the series being pre-emptively cancelled at issue 3 (out next week) which will lead to none of the storylines being resolved. Maybe the left-over plots will be resolved in a future issue of another series, but it seems unlikely. The only major plot point that seems to never be resolved now is what happened to Brad Turner of the MASK team. But honestly, who really cares at this point?
Transformers vs Visionaries is a current series following the aftermath of the First Strike event following the newly arrived people of Prysmos on Cybertron, and the conflict that ensues.My only real prediction for this series would be that by the end, the Prysmosians are displaced to another planet to call their own, isolating them from the rest of the Hasbroverse and the Transformers following the reboot, allowing the Visionaries to potentially continue on as a solo series.
Lost Light follows the continuing adventures of Rodimus and his crew, as well as a few other teams on the galactic-side of things in the Transformers storyline.
The current plot line in the comics is following the Scavengers, showing us their "final" story, and is seemingly wrapping up all the other ongoing plots, most importantly the existence of Cyberutopia and the identity of the mysterious gear faction
This series is extremely unpredictable by nature, but my only real prediction for the finale storyline would be that Rodimus and his friends manage to reunite with the Lost Light crew at Cyberutopia, and Rodimus finally getting revenge on Getaway for his mutiny.
Optimus Prime follows the actions of the Transformers residing on Earth, and (since the end of Till All Are One) on Cybertron. The current storyline is following the return of a couple of members of the Original Thirteen Primes to Cybertron, and what that means for the cast.
From the side stories in the series so far, we can probably assume that Optimus Prime will be heavily involved in the events of the "Darkest Hour" storyline, possibly being the main venue for the event.
Requiem of the Wreckers is a double size one-shot issue due to be released May, designed to wrap up the loose ends of the "Wreckers Saga", which began with Last Stand, and was followed by Sins.Requiem is a total mystery so far, but we can tell that Verity, Springer and Impactor are involved, and it seems to be in relation to Kup as well, despite his death in the Visionaries crossover. So maybe the two previous Wrecker leaders are fighting over how to honour his memory? We'll see in a couple of months.
Finally, we have Unicron/Darkest Hour, the supposed end of this incarnation and the start of the reboot.
From what we know of the series so far, we know that the newly awoken Unicron (seen waking up in First Strike) will head to Elonia (Rom's homeworld) and the Transformers head there with Rom to try and either stop it, or rescue as many survivors as possible.
From the preview pages we have seen, we know that before this event, Rom will return from Microspace and get in contact with the Autobots for some reason, leading to them heading to Elonia to starts this story. We also know that Bumblebee is due to return to life before this event...which is kind of a big reveal for a preview comic to give...
Now, here's my theory on what is happening: Unicron is going to the planets that Shockwave sent his Regenesis Ores to and is eating the worlds to use the ores to power himself up. It is widely believed and accepted that the strange ores on Elonia that create the Solstar armour is one of the Regenesis Ores, so that explains why he is going to Elonia of all worlds.
I think that Unicron will succeed in devouring Elonia, which cripples one of the great powers in the Hasbroverse, following this, the Galctic Council will attack Unicron, resulting in them being destroyed too. Unicron will continue to the other worlds with Regenesis Ores, including LV-117, the world where Wheelie was stranded before escaping, which was shown being destroyed by something in the sky, and was in a weird state of temporal flux due to the Regenesis Ore there.
If you are following my train of thought here, you may see where this is going, Unicron will head to Earth eventually, which I would guess the cast will figure out and warn the populace, offering them transport to Cybertron or another world for safety, which, knowing the humans of this universe will be met with a scream of "Them robots want to steal our planet!!"
Whilst some humans will leave the world, most will not, hoping that either Unicron is a lie or something they can deal with without the Transformers, leading to Earth being attacked and possibly destroyed, leaving the remaining humans homeless, and in fear as Unicron heads to Cybertron, finally taking on his robot mode.
The series will end with an all out battle on/around Cybertron with Unicron between all the survivors from the various franchises, leading to whatever happens in the end.
If this continuity carries on, then I think the remaining humans and others species will be sent to another planet to resettle, leaving the Transformers and other species separated, and left to rebuild, and lead to whatever happens next.
HOWEVER! If this is the start of a new continuity, then I have a suggestion on how to lead into it. During the final battle, have a shuttle filled with various characters hit with some sort of energy, which could be dismissed as them being destroyed on contact by the other characters, but reveal in the final panels of the series that they were just transported to the new universe instead, ready to act as a jumping-on point for new readers, with a set of characters who need the new universe explained to them.
SO let me know what you think of this idea, or anything about this topic and what you want to happen to IDW's series in the upcoming years :D