AH: The Battle of Bouvines went differently

http://en.wikipedia.org/wiki/Battle_of_Bouvines
I was wondering if anybody would do an ATL on a possible Imperial victory of the Battle of Bouvines, and what impact that would have in history up to the present day? What if Otto IV hadn't picked a horse that carried off the field, wounded and terrified, causing his forces to abandon the field? What would this mean for the Empire, for the Angevins, and for France? I would really like to see that happen! ;)
 
I think it might take more than an unwounded horse. But let's say whatever it takes, happens.

How big a victory are we looking at? Philip being forced to withdraw is not the same as Philip and most of the (loyal) nobility of France being captured.
 
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