Well, since none of these are likely to ever be made, I cast my vote for the podracers. Those are still some interesting designs that have never made it to plastic. If I had a choice, I'd rather see some of the bar denizens from Episode II like the death sticks guy or the 'hooker aliens'. There's a whole room full of weirdos in that scene that no one seems to be remembering.
As for Hasbro "inexplicably" abandoning the screen scene line, and failing to "capitalize" on these ideas, tell that to the 4+ year old cinema scene 3 packs that are still languishing at discount retailers. Ever wonder why you never saw that mynock hunt cinema scene? Probably because there are 200,000 of them sitting in a warehouse in Mexico.