User blog comment:Jamie/John C. Reilly Joins Cast of GotG/@comment-3048593-20130617073305

I think Gunn has been clear that GotG is supposed to be a strange but still kinda comedic superhero film, so I don't really see the problem of having someone like Reilly play a character who's important to the Nova "mythos".

Seeing him in that costume may be questionable, but they might get around that by changing it enough.

And honestly, if you think someone like Reilly will make the film less seriously taken, remember this is a team also featuring a talking Raccoon and a talking tree.