Portal 2's Wheatley fits extremely well as the voice of 343 Guilty Spark in Halo: Combat Evolved. This mashup takes the cake.

Most theme music mashups are somewhere between bad and terrible, but here's a rare case when it actually works. Quite well, honestly.

Yes, it might be with that song, but it's surprisingly good. Like, really good.

X-Men and Star Wars, two flavors that taste great together.

[arzeno]

A brilliant mashup of Breaking Bad and the Batman films. Chris O'Donnell makes a great Jesse Pinkman, and look out for a special guest star at 1:45.

If you're not sick of Batman by now, that's good. He's having a big month.

[thanks, brian!]

From Kevin Smith's YouTube channel, the combined "forces" of John Hughes and Star Wars.

[geeksaresexy]

This is a pretty cool illustration re-imagining H.P. Lovecraft and Nikola Tesla as paranormal investigators. While they're certainly rad, in that played-out steampunk sort of way, they would make awesome central characters for that third Ghostbusters movie.

[drawn]