When Breaking Bad ended last year, AMC said in a commercial it would return this summer. Bryan Cranston says it will return in July, and like almost everyone expected, the final 16 episodes will be split in half, with the last 8 airing next year. My guess is January or February. AMC hasn't confirmed the return month or the split yet.
In Vince Gilligan's Nerdist Writers Panel spotlight episode, he seemed halfway serious at the idea of doing a Saul Goodman spin-off (or maybe a character similar to Saul). And he's very much interested in doing other TV shows and movies after BB is over.
And I liked the way he characterized Walter White's arc. People complain when a character isn't likable anymore, and might get turned off the more evil Walt gets. Gilligan says even if you don't like Walt anymore (he says he and his writers don't, anymore), you could still respect his intelligence, and if you don't care about that, as long as you don't find him boring, they're doing their job.