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Based on an idea from a few months back -- what if, instead of inviting the Almoravid forces from Africa to help fight off the invading forces of Alfonso VI, the tiafas had managed to consolidate around Seville? (Details in the link; if they're important here than yes, the Normans are also in the mix.)
What are the medium and longer term prospects of this new Al-Andalus, or by contrast, of the Reconquista? More generally, how does this change the culture, demographics (religious, racial, linguistic, etc), and what not of the Iberian peninsula? And given these general changes, what can we infer about how history is changed?