Avengers: Infinity War - 13 Major Plot Reveals From Trailer 2
3. Bruce Banner Is Over-Run (But Hulks Out)
Thanks to LEGO, we know that Bruce Banner uses the new Hulkbuster suit in Wakanda to join in the battle after he joins his fellow Avengers there for the climactic battle. It's a clever way of equalling the playing field for him without him having to Hulk out, as the suggestion is that he's not keen to lose control to the Hulk as he did on Sakaar.
But, as should have been pretty predictable, the battle doesn't go well for the comparatively inexperienced Banner. Even with the Hulkbuster's power behind him, he ends up over-run by the Outrider army, setting up the grand return of the Jade Giant.
Artwork leaked elsewhere teased this scene leading to Banner Hulking out and bursting out of the armour, and it's interesting to see where that comes from.