Unlike the Infinity War trailers, they are still giving us very little.

They are clearly holding on to the best action sequences. Are they fighting Thanos again, or just trying to reverse the Snap? We don't know. Is Thanos even the main antagonist here? We don't know. Time travel or alternate universe?

Feige & Co. seemed to really seemed to nail the formula for n exciting trailer that doesn't spoil the movie in any way.