While the sets of Infinity War and Endgame are extremely tight, it's no surprise in this time of movie press, where spoil-rots and scoops are the highest currency in the country We have seen some information flow through the locked doors.
It's pretty common that time travel and the Quantum empire are involved, but both were teased into the trailer thanks to the Ant-Man momentum that does not count as leaked info. We can make some reasonable assumptions, like the heroes who return from the dead, as we have already seen Spider-Man in his own trailer for Far From Home. Obviously, Marvel does not care about being pampered.
But what information did they probably not want to bring out yet? Thanks to their own actors, their own license agreements and other reliable sources, we know what to expect from Endgame. And some of them should raise some eyebrows.
Warning: Invariably spoilers ahead …
0. Valkyrie IS Back
After Thanos' attack on the Asgardian refugees in the opening scene of Avengers: Infinity War, Tessa Thompson's former Valkyry had disappeared will be back in Endgame.
How do we know that?
There was always a suggestion that Thompson's character would return – especially because she apparently was at the head of the field to have a purely female heroic team. Movie in the future of the MCU – but Hasbro is required to confirm it.
Her action-action characters for Endgame have now been discovered in the wild, and along with some minor affirmations, the line contains the return of Valkyrie, wearing her white and gold armor. It is, as you would expect, ready for action.