There has been speculation and little bits of info for quite some time about the Edgar Wright directed Ant-Man adaptation for Marvel Studios, there has also been speculation as to whether or not Ant-Man/Dr. Henry “Hank” Pym would be making an appearance in Marvel Studios‘ big screen version of The Avengers.

Now we have word from Marvelous News (via Bleeding Cool) that inside sources are telling them that Nathan Fillion (Firefly, Castle) is virtually locked to play Henry Pym.

“Nathan Fillion is pretty much locked to be Henry Pym, and should be announced before any other new additions to the cast (think around Comic Con)”

This is all (of course) rumor at this point and hasn’t been confirmed or denied by the studio or Fillion’s reps. We will definitely bring you the news if/when someone does… so, stay tuned!