The one I'm watching the most is easily the New Texas Giant. If that ride is half as good as it looks, I think Rocky Mountain will be getting a few more calls from Six Flags, or at least they ought to be.
Other than that, I think Raptor is interesting because B&M is doing something out of their norm for the first time in a while. Plus, the near misses look crazy. Other than that, the only one I'm paying attention to is Cheetah Hunt, but that's only because it's the one I'd be mostly likely to actually get to ride.