Here's to hoping they do a better job with the story with whatever they make next for R&C. But yea, I would be most excited to see a continuation of ItN in a full-sized adventure with a good mix of the presentation of ACiT/ToD and the non-linear game design of Going Commando (bit far fetched, I know).
I feel like there is so much more that can still be done with the series, as long as it's given plenty of good and careful time and attention.
I'm still looking forward to Spiderman though. My only interest in the hero has ever been the first two movies when I was young, but this new game just looks like a heap of fun, and since it's IG, I am sure it will be.
Go and play some LittleBigPlanet, it's good for you!