I hope the new Charlie's Angels keeps the theme song.
Some shows aren't using original themes though, like the CSI franchise, which uses songs by The Who. I think the idea is that it has a built in hit and the composer doesn't have to try to come up with something cool. I think that's just lazy.
Even movies these days don't always have a great theme tune. They used to have lots of classics. Now they're barely memorable at all, especially these super hero movies.