Why does every update have to have a theme? Most of them haven't. The last 4 updates in a row happened to have themes, but that doesn't mean every update will.
Anyone thought about that fat little Endermite? You know, the 1 where Dinnerbone had an "Ultimate Plan" for? Remember the unused Red Dragon... What if the endermite is supposed to hatch the egg and it creates the Red Dragon? Maybe that could be 1 of the upcoming features in this. That would be so cool and that would give a reason to why Mojang would've added them and not for some useless extra mob.
Will 1.8 be a Villager Update, or will it not be a "themed update" at all?