Leave it to the Internet to figure out in less than 24 hours that the trailer for X-Men: Days of Future Past features the same song as X-Men Origins: Wolverine. The trailers both feature "Adagio in D Minor."
I have only one concern. I was reminded of how awesome I thought X-Men Origins: Wolverine was going to be when I saw this trailer way back in the day. Hopefully Days of Future Past doesn't disappoint like that one did.