Its hard to know which project will actually be "next", but it will probably be the two .15 size Goodyear racers on my bench now. I voted in the big category though, since the next Stunt model will trial a .76 first up.
I also have a piped .12 Mini-Novi3, speed models .12-.29, .15 combat models, .40 carrier Sea Fury, and maybe others but they will be later in the year.