I´d love to see the posibility of "old empires" coming back to life too. Examples? Well, the most evident is India, coming back to the times of Asoka after the 1857 uprising; but a second Khemer Empire in the SE part of the Asian continent would be cool to see too.
The Mughals, or even Egypt (a sort of Mamluk revival?)
In fact, VIP had the possibility for the latter, though unfortunately the events weren't perfect when I tried it (afaik VIP:R 0.1, not sure if I tried it in 0.2, certainly not 0.3!) - but even at that, it was quite unlikely (required defeating an Ottoman Empire which received quite generous European help, in my case, I was France helping the Egyptians, which required a lot of commitment - which proved to be very entertaining!)
Persia, certainly, and China should have the ability to do so in rare cases.
Of course, during this time European civilisation was going through a gigantic change, a leap forward, with momentum that was so very unlikely to spread outside Europe - but I agree, under certain leadership and certain circumstances, it should be possible. It would prove to be very entertaining!