10 Essential Marvel Heroes Not Yet Used In The MCU
6. Wonder Man
Wonder Man started out as a villain, but soon made the transition into heroism and became a full-time Avenger. He is one of the more powerful members of the group, but is a bit too similar to Tony Stark, which may be the reason he hasn't shown up in the MCU, but that's not the only reason...
Simon Williams, aka Wonder Man, is an actor in the Marvel Universe, which is why Nathan Fillion was cast to appear as him on posters within the MCU. That's right, he was supposed to make an appearance already, albeit as a prop. Fillion did some work for Guardians of the Galaxy Vol. 2, but it never made it to the final cut. James Gunn mentioned he would likely pop up sooner or later, but he provided no further details.
Seeing as Wonder Man was cast, shot, and on the brink of making at least a cursory appearance in the MCU, it stands to reason he is on the back burner to make an appearance sometime in the future.
The chances of him landing a solo film are there, but he will most likely make an appearance alongside other characters, possibly in a future Avengers outing.