Suppose that, in 1071, the (for the Byzantines) disastrous Battle of Manzikert is either a Byzantine victory, or an earlier PoD leads it to never happen in the first place. The Seljuqs are still around, but they never venture into Anatolia. So, my question for all of you is-what happens to the Seljuqs? Does another area become Turkified in lieu of Anatolia (and if so, what region)? Do the Seljuqs become absorbed by those they conquered? What becomes of the Seljuk Empire? Do the Crusades still happen?* Anything else I might be missing?
*I highly doubt it, but Western Europe could still try to get the Levant back without the Byzantines calling for it, for all I know. I'm not 100% sure.