A quick Google search shows that there is a ton of Doctor Who/Lord of the Rings crossover fan fiction, as you might expect from two of the most devout fanbases on the planet. This news goes out to the large intersection of that Venn diagram. Doctor Who star Matt Smith mentioned to the Waikato Times [via AICN] how much he’d like to shoot an episode in New Zealand, especially if Rings director Peter Jackson were involved. The Times got Jackson on the phone, and the Kiwi filmmaker was happy to entertain the idea:
“I’m a huge Doctor Who fan, and I think Matt’s fantastic. Just name a time and place, and I’ll be there!”
Will it ever happen? Probably not! But the door is open. Steven Moffat and Co. have to at least ask now, right? Imagine the possibilities (preferably in the comments).