There's nothing that'll compare to Starcraft 2 in the coming years. No studio / publisher is willing to commit so much time, money and passion to a C&C game.
How can you even get a competent / passionate team together if the community's as fragmented as is... (meaning that there are people who actually like the past few C&C games)
Also, it's not as if the games themselves stuck to their own canon, they were also very inconsistent allround.
It's very unfortunate, for me personally I wished they would continue past the Tiberian Sun Firestorm story and do something decent with it (and to be honest not what Westwood had intended, that felt sort of cluster****-ish)
Alas it is not to be.
That's the gap we as modders fill I suppose.