The third trailer for the Heroes v Aliens CW crossover event has dropped, and it's characteristically stuffed full of hints for the four-show event. The Invasion! adaptation is sure to be a show-stopper, and with the fate of the entire world hanging in the balance, the stakes are definitely high for the Super Friends.
But there's one little hint in the trailer that may mean that, for all our heroes' efforts, the war may ultimately end in victory for the Dominators.
At one point, we see Barry and Oliver in the secret room in S.T.A.R. Labs, created by the Reverse Flash so he could keep tabs on the future. In Season 1 of #TheFlash, Thawne-as-Wells would continually check up on one specific event in the future — the disappearance of Barry Allen in a 2024 "Crisis". Even with Barry's frequent alterations to the timeline, this version of the future remained intact... until now.
It's difficult to know exactly much worse the future could get, considering this news report was hardly a good thing for Barry. We're left wondering whether Barry and Oliver are looking at the same newspaper, or whether they're using Gideon to check up on the future in general.
It could very well be that, after some action is taken by the Super Friends against the Dominators, Barry and Oliver check the future to find they in fact lost this war. That would be an effective way of upping the stakes for the battle, keeping the viewers on their toes by establishing that anything could, and probably will, go wrong.
This would also explain why, although he goes missing in 2024, Barry is able to send a message to Rip from 2056, warning that "a war is coming."
But there is another option — this war isn't changing the future, but putting events in motion that will lead to that 2024 "Crisis".
Arrival Of The Anti-Monitor
There are two events in DC history named Crisis: Crisis on Infinite Earths, the crossover event that established the existence of the multiverse to explain continuity mistakes, and tidied it up a bit; and Infinite Crisis attempted to reinstate it. Considering the Flash died in Crisis on Infinite Earths — as did Supergirl — it seems most likely that this is the "Crisis" referred to in the newspaper fro 2024.
It's possible that the events of the Heroes v Aliens CW crossover are setting up an eventual adaptation of Crisis on Infinite Earths, possibly for another four-show crossover. This would be really exciting, not only explaining that huge plot-teaser from The Flash Season 1, but using the established CW multiverse in a really interesting way.
In Crisis on Infinite Earths, the supreme celestial being known as the Anti-Monitor attempts to destroy the multiverse, replacing it with his own multiverse made of anti-matter. It's possible that in Heroes v Aliens, the battle between the Dominators and our heroes actually draws interstellar attention to Earth.
The Anti-Monitor might see these heroes as a genuine threat to his plan, especially now that Supergirl has crossed over from her Earth to Earth-1, proving that the Super Friends have the power to use the multiverse to their advantage. If I were the Anti-Monitor, I know I'd want to destroy the multiverse quickly, before the Super Friends noticed what I was up to.
So maybe that's what Barry and Oliver see in the future room — an entire multiverse facing destruction (indirectly) because of them.
Ok, so this is a bit out there, but considering that "Crisis" Easter Egg — and the fact that both Supergirl and the Flash die in the Crisis on Infinite Earths comics — it would be super cool to see this arc adapted on The CW.
Or maybe Barry just found out that Big Belly Burger doesn't exist in the future.