The man has great in-ring skills, but there's plenty of guys like that in the WWE. He'd fit right in with the likes of Rey Mysterio, Evan Bourne, John Morrison, etc. Only problem is they're all better looking, more charismatic, and already have dibs on the high flying undersized underdog gimmick. He'd probably have coasted to the win on NXT if he had some abs, or was any good at smacktalk, but he's done nothing but show some cool counters and submissions. WWE is all about who's selling the most T-shirts, and I wouldn't be caught dead wearing one with that face on it.
TNA was made for guys like Danielson. If he really has been kicked out of the WWE, I'd be surprised if he hadn't already gotten a call from them while he was still clearing out his locker. I do think that with his speech, and with the support of the hardcore fans, there's a good chance he'll be back. It's really hard to tell what is and isn't scripted on this show aside from the matches.