Umm, just a little point here.... the only movie I can recall that ever included any 'real' aikido and reference to it was "Nico:Above the Law"
Most of them just recycled the theme of him being a (not so) lean, mean, fighting machine that was a trained Navy Seal or CIA spook etc, etc....
Casual ction movie fans don't get too caught up in authenticity (some of us picky fans do though :P ) .... Just look at JCVD in Kickboxer taking on a Muay Thai fighter, using his traditional choreographed moves..