Blizz even said in the next patch, if they were to add any leveling, it would be only 5 levels. So with the cap being 95, you have to consider most recent lore... If there was a hero class next expansion it would have something to do with Garrosh, the sha and the lore that follows that. I cant think of any particular class that would be similar, but if they were, I bet they would introduce something new right at the end of siege to follow the ending of this Xpack. They have done it everytime a new Xpack comes in, why would they deter from that introduction style.