It looks like Steven Moffat has talked to Peter Jackson about directing an episode of Doctor Who when he gives the hobbitses a rest.

Jackson's a little busy right now managing five armies, but apparently he's interested. So talks have been had, the seed has been planted, and Moffat seems to think it'll "probably happen at some point."

That is, according to AV Club, who says it's according to SFX and Collider.