Well this is not a direct answer to your question but is one that "could" solve your problem.

I'm not much into animations, however, I read somewhere here of a plugin that can create a spline for animation path and can importa another spline as animation path.

If that is indeed the case, you can generate the path for the first animation, then place it in the origin, and generate the new animation... I hope you're able to fix it and if you do, please share your solution.

EDIT: Well there is a path for sure in Key animation, but I don know about generating a path from existing scenes. I don't even know if the Key animation path is actual geometry... Maybe you can speed up your animation recreation with it though...

http://sketchucation.com/forums/viewtopic.php?p=320705#p320705

There are other animation plugins. Maybe one could do the trick.

JQL