VIDEO : Are There Hidden Characters In The Trailer For 'Avengers: Endgame'?

Many beloved characters died at the end of Avengers: Infinity War.
ComicBook.com reports fans are speculating how the characters could potentially return to the Marvel Cinematic Universe in a future film.
A fan thinks Groot, the dead Guardian of the Galaxy, might have already emerged in the teaser for Avengers: Endgame.
Avengers: Endgame hits theaters April 26, 2019.