For me it would be s comic styled, 2000AD line with the focus on the Judges. Not only could we have Judge Dredd but the rather colour full cast of Mega City One such as the Angel Gang etc. For vehicle assortments we could have the Law Master and for a creature assortment, the T.rex, Satanaus (spelling) would rock!We could have the ABC Warriors such as Hammerstein thrown into the line also!
Does it have to actually exist? If yes- the DX Symmetrical Dockers from GaoGaiGar. If no- MEGAS XLR & Sym-Bionic Titan in toy form.
This Batman called Nekhrun from a Elseworlds comic called "Batman:Book of the Dead". In this story, Nekhrun is one of the Egyptian Gods (who were really aliens) of mystery whose animal was a Bat. Indirectly influenced Batman to become who he is.
Hmm, a MISB Hot Rod would be nice, I would keep it in a sealed plastic case. Yamato Vf-1a Low Vis urban camo with the appropriate GBP armor would be cool too, and would be considerably less than the toy mentioned before. Complete Fort Max would be cool too. Anything really badass and Macross related would be awesome in my book though.
The original morphing Dino Megazord. I've been wanting one since I was, like, 5. And a 1:24 scale Action Kyle Petty car.