Newsflash: Marvel casts someone with close ties to Joss Whedon in one of their movies. Nathan Fillion was cast as Wonder Man for Guardians of the Galaxy Vol. 2. I know Fillion best for his role as Captain Hammer in Dr. Horrible’s Sing-Along Blog, but his roles in Castle and Serenity seem to get more attention. Whedon is the writer and director for The Avengers movies, which will eventually cross over with Guardians of the Galaxy.
Wonder Man first appeared in The Avengers comic books in 1964 and was immediately killed in the first issue. Something similar can be said about most of the dates I have been on.
If I had my way, Ben Stiller as Tony Wonder from Arrested Development would be cast as Wonder Man. In this scenario the actor is playing a fictional character that is playing another fictional character that is based on a comic book character. There are many reasons I do not work in Hollywood.