if Jackson Lake will be a season 4 drop, then Rosita Farisi should be a companion too! :), maybe in a tv based level where Jackson believes he is the doctor.
what about a new costume for the TARDIS? the "Tethered Aerial Release Developed in Style" (the hot-air balloon TARDIS) owned by Jackson Lake
since Rory has his father, Rose should have Jackie and Donna should have Wilfred...and why not, sylvia Noble ans Shaun Temple too!
i would love to see Lady Christina de Souza, Astrid Peth and Bannakaffalatta