The rumor mill is saying that it's Fifth (Davidson) Doctor and The (Anthony Ainley) Master (as per Planet of Fire) and/or an Eleventh (Smith) Doctor and Dalek (Big Assed) Scientist are gonna be the exclusives for the 2010 San Diego Comic Convention. I've also heard about a Fifth Doctor Castrovalva regeneration Davidson in Baker gear with removable scarf, but sorry, that sounds boddo.
This is gonna cost me shit loads on eBay, though it's very possible these might show up on the shelves in 6 months avec special packaging.
So, anyone going? I'll swap you for UK only Forbidden Planet exclusives ;-)