Lord Nero
Ultraviolet Sentinel
I don't know, I wouldn't put it past Capcom. Didn't they cancel a hell of a lot of Mega Man games? In any case, they don't seem to care much about DMC's consistency in terms of plot, at least not since DMC4. Nero and his arm just don't make any sense. What I'm trying to say is they have a lot to figure out.So I believe there will be an announcement of a DMC5 eventually. After all, Devil May Cry is one of their best selling brands, I don't think they'll drop it completely.
It's possible they're figuring it out right now. I certainly don't expect them to announce a new DMC at TGS, because that would imply they've already started work on it. If they have started work on it, then I'm very afraid for DMC's future, because you don't just think up a story, characters, soundtrack, and gameplay 'just like that'. They need to take their time and come up with something that'll please the majority of their fans. Sadly, they've seemed mostly incompetent at that up to now.
Dragon's Dogma 2 is a possibility, though it's not exactly their priority, since the first wasn't *that* popular.