Well I have some IRL friends coming back, that I played with back in Vanilla when we were all 12-14 years old in around 6th grade, and then most of my family will play for sure, along with friends of my brother's as well, so probably we'll be a bunch of people at least in the start, but obviously everyone isn't going to have the same amount of time to play but regardless it's going to be extremely fun at launch and a while after. Probably leaning towards Alliance for now, both me and my brother have always mained Palas, but I'm not entirely decided if I'm playing something else this time around, but I don't think anyone's planning on playing shaman so there's no need for Horde tbh.
Now do I think I'm playing the entire 2~ years of content in Vanilla? Don't know to be honest, depends how fun it is, I never touched Naxx in Vanilla and barely any AQ40, so there's still content I haven't even touched which would be nice to do, but to get there I'd have to do all the previous raids and stuff to be geared for it so I'll see if I think the time is worth it. I know for sure it's going to be fun as fuck in the beginning though when we're all leveling, the world PvP etc. I'm almost more looking forward to the road to 60 than endgame stuff honestly, can't fucking wait man.