Regarding the Nostalrius news, will be good to see Blizzard finally say yes or no.
I'm finding it hard to predict what will actually happen, I mean yes they let the MOBA genre slip through their fingers after years of the DOTA community begging and pleading with Blizzard, but they did come around eventually (heroes of the storm), albeit far too late. On the other hand, they got the timing right on Overwatch and Hearthstone. Also with the departure of Metzen and the huge raft of changes/deaths/promotions/demotions in the lore in Legion, I'd expect the next expansion to take longer than usual, just while whoever is coming up with the plot figures out where the hell they're going to go from where we are now. I can't blame Metzen for wanting to go out with a bang, and tie up as many loose ends as he could, and it was a bit of a selling point, with virtually every major and minor character in the lore showing up in Legion, but I don't envy whoever has to pick up the pieces and try and cobble together the story for the next expansion.
I can see them launching legacy servers and giving you access to both versions of WoW under your b.net account, but I can also see them playing it safe and not wanting to take the risk, given the success of HS & OW. Because while the MMO genre will always be around, the golden age of the MMO has been and gone, and I'm not sure whoever is in ultimately in charge of the purse strings at ActiBlizz would be able to be convinced of the case for legacy servers, given that it targets a niche market, not the usual 'everybody and their mother' market Blizzard usually goes for. But on the other hand, if they play it smart and start small, launching servers to match the demand, it could be pitched as low risk, low investment, and a value add to retain subscribers and bring back old ones.
If I was betting I'd probably lean towards a no, but I'm still really struggling to go with that call given that Legion feels like a bit of a swansong for WoW, and between now and the next expansion would be the perfect time to launch legacy servers, if they've decided to.