Problem is, "old McPvP" is no longer here; it died for genuine reasons that can be avoided. People think they want an old McPvP, but in reality its a new McPvP that would be best. Considering McRPG is insanely similar to raid, one of McPvP's earliest gamemodes, CTF's been rumoured to be coming soon, too, and build is already out. That's 3-ish gamemodes already. I have a feeling this could be the closest we'll ever get to a new McPvP, especially if something similar to HG comes out.
Whether or not that's a good thing, I don't know. It did die after all. But its a possibility.