Servers are up with the new class changes and new transmogrification/wardrobe system for Legion. Coming soon will be access to the Demon Hunter class (if you pre-ordered Legion) and the Demons will return to Azeroth to invade.
There are a TON of character changes to get used to, from removal of stats like Multistrike and Spellpower to removal of Glyphs, lots of items turned into Toys and Gnome Hunters!!!! You’ll be able to use all the talent trees for your class and switch among any and all of them within cities or class order halls (or in the field with an Inscription item).
Time to log in and start cleaning out that bank and re-doing hotbars…again.