The epitaph for Enterprise is, "Too Little, Too Late". I saw three of the last four episodes, and was actually quite impressed. If the show had been that good from the start, I would have watched. I never caught their mirror-universe episodes they did, but I had heard some good reviews of them as well. Even better--they changed the opening credits for just those episodes. And the music rules. Someone did the right thing and edited the normal credits video together with the mirror-credits music. The end result is just right.
Apparently, Paramount also assembled them using the music from one of the later movies (Generations?) and it works really well too.
By the way, I'm not looking forward to the new film that's in the works. Leave it on the shelf for another five or ten years. Let that well refill. We neither need to see Matt Damon trying to out-Shatner Shatner, nor not-Shatner Shatner.