All the focus on 'The Avengers 2' has recently fallen on one of the film's new additions, Quicksilver, as Fox has unexpectedly cast their own version in the new 'X-Men: Days of Future Past.' (You can read all about that bit of drama here.) That said, we've lost sight a bit on what the Marvel sequel is ultimately about -- the new villain -- but director Joss Whedon has a lot to say about him.

In light of the post-credits scene from 'The Avengers,' everyone is rightfully under the impression that the "Mad Titan" Thanos will be the primary antagonist in 'The Avengers 2,' though neither Whedon nor Marvel have "officially" stated so. Regardless, in an interview for the latest issue of Empire magazine, dropped a couple bits on the villain:

I'm very excited about the villain, and have a lot to say about him. [NOTE: Yes, it's a "him."] But if you watch my shows, the one thing I've never been very good at is guest stars, because I've always been interested in the ensemble. With 'The Avengers,' I'm still most fascinated by them.

The other thing is, you don't try to top it. I know I will never make a moment as pleasing in a film as Hulk and Loki. You can't chase that dragon. If you try to do exactly the same thing, the chances you're going to do it better are very slim, and the only reason for me to devote three years to making another Avengers movie is the hope of making a better one.

It's been pretty much confirmed that we'll be seeing Thanos in 'The Avengers 2,' and in some way in 'Guardians of the Galaxy,' despite Whedon's reluctance to say so. On top of the presumed return of Robert Downey Jr.'s Iron Man, Chris Evans' Captain America, Chris Hemsworth's Thor, Mark Ruffalo's Hulk, Scarlet Johansson's Black Widow and Jeremy Renner's Hawkeye, the team will also encounter the magic-wielding Scarlet Witch and her speedster brother Quicksilver, two characters which Whedon finds to be particularly interesting additions to the team.

'The Avengers 2' hits theaters May 1, 2015.