You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
If the Mongols are disunited, could a unification of tribal confederacies be led by chiefs from a different ethnic group, which in turn would lead to an alternate invasion of China, Persia and Europe? I thought I saw something like this discussed in the discussion thread for Chaos TL, but I may be mistaken.
Looking around (I confess, at Wikipedia) I got the impression that a sufficient diplomatic disaster in the 1120s could derail the Song-Jurchen alliance against the Liao Dynasty, and perhaps, with the right leadership, enough factors pushing against further, um, 'sedentarisation', and a morphic-twin-Temujin we could see an unlikely Khitan Conquest.
Further back, there are the Göktürk and Uyghur empires...