Like many of you, I have been playing this game since it opened its doors, and would love to time travel, not just inside instances, but an entire expansion!
I realize technically, while its probably easy (assuming here Blizz has everything saved) to give players the option of going back and enjoying a particular expansion, the challenge lies withing updates and bug fixes -or so I have been told.
As for myself, I would be willing to pay a bit more for a feature that allows me to time travel and re-enjoy a particular expansion, from Vanilla all the way to Wrath of Draenor. You?