Bantha- why not?
AT-ST- another vehicle I don't have a modern version of. Everything else has been out in the last year or two, so why not?
TIE Interceptor- Maybe in white, or a grey that doesn't look like blue. I'm not sure if the wings are proper scale, but I doubt it just as I doubt Hasbro will make bigger ones for it.
I really can't think of anything else. Maybe some of the unreleased Podracers that were rumored but never saw the light of day.