Get out of here. We don't want you here.
Anyways, if they take out High Templars, they take out Archons, and THAT would PISS me off. I LOVE Archons.
I think the core units will stay. I mean, Dark Templars were expansion, but that was mostly because they were so freaking awesome in the campaigns that people demanded they be available in multiplayer. They're now such a hardass part of BW that I don't see how people could just dismiss the ninjas.
It does look, however, like the Arbiter is being replaced by the "mobile pylons."
And I dunno what they've all done to the Hydras, but they are different. If you watch the cinematic trailer and the concept art, you see that the Hydralisk's arms are different...instead of a single scytheblade they look more like skeletal bladewings, kinda like Kerrigan has. NO telling what else they've done, but there's definitely a cosmetic change. Maybe Hydras are now ranged/melee units? That'd be cool, and I always thought it was funny that the most threatening-looking beast the Zerg had was ranged-only.
One thing I think would be absolutely hardass is if the Zerg Queens could infest other Terran buildings besides CCs, and pump out various infested versions of Terran units. With all the other stuff they're doing, I wouldn't be surprised if they went that far.
And a big question that comes up with the appearance of inter-terrain units...will they make anything that can move through water?