They half did an F-35 in the early couple movie toy lines, the back half was not very close. odd given they had the Lockheed license for the F-22.

I've said it before, I'd love to see a proper F-35 Alt Mode. maybe in a few years once it's more commonly in service.

As for other un-used alt modes. I agree with the 'normal' approach, a bus, more normal cars. A Tesla would be fairly topical, though a little less normal than say a ford falcon.

I'm actually surprised more car companies over the years haven't approached Hasbro with marketing ideas of their current model vehicles.