Judging by the Dev Diaries I've read, there will be plenty of options to get a bloodlines.Does anyone know can you form your own famous bloodlines without needing to be part of the warrior lodges i.e. i normally play umayyads or a custom Egyptian character can i still make famous bloodlines with them?
Devi Diary #85 mentionned Historical bloodline for famous characters. Screens show Charlemagne, Niall Uà Nieill, Sasan (for the Sassanids), Eleanor of Aquitaine, Attila, Songtsen Gampo, William Wallace, Temüjin (aka Genghis Kahn), Basil the Bulgarslayer (I think) and Saladin. I imagine these aren't the only ones.
Devi Diary #93 mentionned that events to simulate in the Fourth Crusade can result in the first Latin Emperor will get a bloodline to remember he's responsible for the shattering of the Byzantine Empire. Devi Diary #94 mentionned you could get a bloodline by being especially friendly with the Teutonic Knights, acting like El Cid in Iberia or performing the Reconquista. And the, the last Dev Diary (#97) mentions the possibility of gaining a bloodline from joining a Warrior Lodge. So I guess this means you can get bloodlines by performing certain actions.
Overall, I'd expect you can get a bloodline by having a character performing deeds that would count as making that character famous in History.
And of course, it's fully moddablle so I expect plenty of mods for bloodlines to come around.