Lucasfilm’s 1986 Howard the Duck may have been one of the biggest bombs of the 80s, but technically it is the first Marvel movie that Disney owns. Howard the Duck is a Marvel character, and Disney now owns Lucasfilm, so that makes the movie the first Disney Marvel movie. The character has made two canon appearances in the Marvel Cinematic Universe, in both Guardians of the Galaxy movies, but he almost made it into Avengers: Infinity War in the script stage.
The Russo brothers explained in an interview with Fandom how Howard would’ve fit into the movie:
Russo said, “Howard the Duck was in one draft of the script. Howard the Duck actually had a really good scene… we were going to cameo with [The Hangover and Community star] Ken Jeong, with Howard the Duck. That was a much-beloved scene by us but it just didn’t end up fitting at all.”
Joe described the idea for the scene, “Yeah, it was [Peter] Quill trying to track down some information from Howard the Duck on some outlier planet and interrupting him during a poker game.”
It’s a same that was cut, as it sounds like that would’ve been pretty funny. But Avengers: Infinity War is paced so perfectly where two-and-a-half hours seems like one that maybe it’s the best that it didn’t slow down for something like a fun Howard the Duck cameo.