#1 - Sept. 9, 2016, 8:43 a.m.
They will probably not announce a new expansion because it was already dismantled and we probably will not get an announcement for D4 because not enough time would have passed for the development to already show reasonable results.
BUT, what if we get a new class?
It could make sense:
Josh Mosqueira could have left after the class was finished and now the team just has to create sets for this new class.
Also we would get it for free at the 20th anniversary of Diablo.
And what would make us loose our sh*t more than the Necromancer?