Ubisoft are French, right?
Another thing that's French, is
free running.
And a game that Ubisoft did, is
Prince of Persia: The Sands of Time, which has a splendid engine for running and jumping.
They could take the combat and Persian bits out of PoP, add in a few more different kinds of jump and stuff for the buttons you won't need any more, transfer it to a "gritty" "urban" "environment", and give it a Tony Hawk's skateboarding thingummy style structure, and make the world's first free running game. It might be good.
Or at least, it wouldn't be another driving game or first person shoot 'em up, like everything I got for Christmas except Psyvariar and Prince of Persia.
(I'm stuck on a fighting bit in PoP, in case you were wondering. The bit where you fight your father. It goes on and on and on and I'm not enjoying it. I like the running and the jumping bits.)