The Emerging Factions (Rebels and Revolutions)

[Pinxit]

Emerging factions, rebels and revolutions will add a new dimension to the game. However, what I really dislike about Total War games in general, is the fact that when you reach a certain point in power and success, there is nothing there to put up a fight, to challenge you anymore. Consequently, all that remains is to, without major resistance, conquer the rest of the map.

The Emerging Factions should help overcome this dull fact. Also, it should be a great way to tear apart a stronger enemy.
Hm... is it possible to "inspire" the potential rebels in a hostile faction to rebel? And if so, in what ways? Diplomacy?