Glad someone brought the Dragonsworn class back, that was always an intriguing one to me. It already exists in the game, but it's all NPCs. Mostly in Dragonblight but also pretty much all the NPCs for the Scarab Lord/AQ shit. Tinkerers are cool, and I'd love to play one since they've existed and have been developed through various NPCs since warcraft 3, but I just don't see a tinkerer coming AFTER we already explore mechagon, ya know? That seems like the time to release it.
Dragonsworn would tie in all the resurgence of Dragon lore AND Lich King lore, considering Dragonblight is right there. Imagine the Lich King doing some timey-wimey bullshit and raising Galakrond from the dead? BOY
that said I don't believe any of these leaks other than a Lich King revamp, but I don't think it'll really be a WOTLK2. Hopefully it just doesn't have a stupid ass name like Battle for Azeroth.