Nah, Robert Plant doesn't want to do anything with Led Zeppelin anymore, so they definitaly won't. Even if they did, John Bonham is dead, anyone who knows Led Zeppelin knows that Led Zeppelin isn't Zeppelin without Bonzo. His presence is so freakin ridiculous.
I would expect more ac/dc
however, if they good get some old led zeppelin songs in, that would be cool, like...after stark has his troubles, before he gets ready for a final battle,thiis song could certainly work, with the intro, and the words are..sort of appropriate/