Thinking of what still needs to be made as far as variants for the Docs. Let's see...
Third Doctor in Second Doctor's clothing (Not really seen in Spearhead, but could be cool anyway).
A few Third Doctor variants for his various outfits.
The Fourth Doctor's main Graham William's outfit (Kind of light brown, with the hat not worn as often).
Fourth Doctor in Thal clothing (From "Genesis")
Fifth Doctor in the other sweater he wore for his last season.
Fifth Doctor in "Planet of Fire" suspenders (Why didn't they do this for the Ainley set?)
Seventh Doctor in Six's coat from Time and The Rani
and no #1 IMO-TV movie McCoy!
Also for the other figures:
We still haven't got a special weapons Dalek. Apparentally this figure was being made but they had to go back to the drawing board for some reason.
Ice Lord. We have an Ice Warrior, it'd be cool to have their leaders.