Quote Originally Posted by King Orko
Does Someone know what the hell are the AI factions? are these rebels? are these non playable factions? are these playable factions? what are these things?!!!

Dude, every faction, other than the one you're playing with, is controlled by the AI. What the faction list reffers to as 'AI factions' are the ones you can't play with, so they're AI in every game you play. Like the hordes, Aztecs and the Papacy in vanilla.