How many timelines are you working on?
They all seem to turn around this XII-XIIIth Centuries period, though. This time, it looks like the story of Ramon Berenguer I, who fell passionately in love with Almodis de la Marca in an accidental trip and they both escaped to marry. The Pope forbade it, no one liked it, but they did it anyway.
Anyway, what I see is that Aquitaine is a very rich, very important duchy, and Louis of France would not loose it so easily, especially not to Ramon Berenguer IV, who in his eyes is just a mere rebel count.
In this timeline, RBIV has no support in Aragon, so it's him and Aquitaine against a Louis who reclaimes sovereignity over Barcelona (since it had been part of the Carolingian Spanish March). I bet Louis would win the war, Aquitanian nobles were known for having a rather odd and contradictorious sense of loyalty, and they would desert RBIV (since it's not his war).
BUT, the Occitan lords, like the count of Toulouse, the count of Provence, the Trencavels, etc, would probably see Louis' campaign as a threat to their autonomy, and so they might ally with RBIV and Alienor.
In the end, I see a war between Northern France and South-Western France+Provence+Catalonia, which would probably end up in a draw. The peace treaties would give RBIV total sovereignity (advancing the treaty of Corbeil some 150 years) and the possibility of claiming several territories in Southern France, while Louis would get Alienor as wife.
But it would not matter so much, because just like in RL, Alienor and Louis would not have any son, and Louis would have to repudiate her. Then she might marry Henry II or even the king of Castile, the Duke of Burgundy or the Count of Flanders. Either way, it's yet another threat to France.