Classic WoW release could open up cool "time travel" aspects to the game
If Blizzard releases the classic WoW and then treats it as a new timeline, they have a fresh canvas to work from while keeping the old worlds relevant via "time portals" or something like it. This could bring the game a huge modernized idea that could help the franchise stay relevant. Many cool and new mechanics could be designed around that. If they could recreate your old guild raids and you act as an observer...They could use all that old data to make an incredible experience. If they can reconstruct it, if they still have ALL of that data. I personally am not interested anymore with WoW, it would take something like this to get me back into the game because my interest is in reliving my old experiences with my guilds.