I don't think CF was planning on giving CGA new rides in the future. I believe it was for "beautifying the park" more than it was for rides. Although, in the past few years, there have been a few notable improvements. As Angry_Gumball stated once, the iPod playlist is gone. It does still remain in the Action Zone area, but it somewhat fits. The rides have been getting fresh coats of paints, and I think the most notable of all is the retracking of Grizzly. It's amazing how they've made this park LOOK better. If a new ride does come, I would be thrilled (get the pun? ), but I am still very happy that they are beautifying the park.
I believe the latest rumor to be spread around is that Grizzly might be taken down. NEWS FLASH: Grizzly isn't going ANYWHERE!!! Grizzly is a) VERY popular (there's almost always a line) and b) has gotten some MAJOR investments from CF. I extremely, extremely doubt Grizzly will be torn down. If this whole "we're tearing down a ride" thing is happening, it had BETTER be Demon. It has hurt A LOT in recent years. So has Vortex, but Demon hurts MORE. Yeah, I know, it's been there forever (it was Turn of the Century in 1976), but either do something about the bumpiness or get rid if it.
So as far as I know, Demon and Grizzly are the two that are rumored to be leaving. Either one would leave a large enough space for some new ride (maybe, oh I don't know, the park's first launched coaster since Tidal Wave?), but it all comes down to their final decision.