I'm probably in the minority, but I don't think Age of Apocalypse sounds very appealing for film. I'd rather they give Apocalypse his classic treatment as an omnipotent mutant Darwinist.
Still, I've been pining for Apocalypse in an X-Men movie. He's one of my favorite X villains and I love the stories built around him (X-Cutioner's Song, Uncanny X-Force, Uncanny Avengers). I also think that his character offers a fresh perspective as far the mutants-humans relationship goes (the Xavier-Magneto dynamic has grown stale now, and theirs are not the only paths/causes).
Hopefully this paves the way for Mr. Sinister, Cable, and ARCHANGEL to show up on-screen, as well.