with the BL2 heads/skins combos, there's plenty of variety for repaints. I could see some of the specific manufacturer skins being made convention or store exclusives. I personally think the 3 and 3/4 inch scale would be best, as it'd give plenty of scope to release the larger creatures and vehicles, as well as making it relatively inexpensive to buy up multiples of the enemies, and get some weapons packs out.
assembling a Neo-G1/TF:TM cast. Please PM if you have (or know of) the following at a reasonable price: Classics or Henkei Astrotrain, Sunstreaker, Sideswipe, Blurr, or 3rd Party iGear Ratchet and Ironhide.
Also looking for Universe Repugnus and Overbite, Frostbite and Longhorn and any Webdiver toys.