A photo of the actor wearing a T-shirt with a Gadsden flag surfaced on social media, causing critics to note the symbol's alleged ties to white supremacist groups.
The Murph Challenge is named after Navy SEAL Lieutenant Michael Murphy, whose heroic acts were portrayed in the book and film "Lone Survivor."
Chris Pratt, for example, will reveal his secret man-crush and other answers to Ellen's "burning questions."
Trump is cast as the unseen villain because "I really just don't have any interest in looking at his face more than I have to," says creator Adam Reid.
Marvel blockbuster had 2017's second biggest opening, behind Disney stablemate "Beauty and the Beast."
The fact one character spends half the film running around in stilettos, has not gone unnoticed by film goers... or feminists.