Deluxe Bonecrusher is not very popular at all, and I think it's because customers don't want one that's so small. I personally am holding out for a voyager class one. The Bonecrusher vs. OP fight was one of the crown jewels of the movie, and yet the only Bonecrusher figure availible is too small for either version of Optimus Prime to fight! That's absurd. Hasbro / Takara would be very wise to release a voyager one (IMO he's not an important enough character for a leader class fig though).
A leader class Starscream would be desireable not so much because the Voyager figure is too small, but because the vehicle mode is fairly underwhelming. It'd be nice to have a SS figure that turns into a much larger scale F22 without the undercarriage, and actually has poseable hands rather than guns with "fingers" on the sides. He should be a tad shorter than Megatron and Optimus Prime when in robot mode IMO, but noticeably taller than a voyager figure.
And I can't stress enough, they NEED a leader class Blackout! Hopefully, if they do him he'll have motorized propellers and be able to convincingly hold deluxe Scorpinok as a passenger.