There are really only two "dream toylines" I have left I think -
3 3/4" Blade Runner - Deckard, Batty, Pris, Leon, Zhora, Tyrell, Rachel, Sebastian, Gaff, and Bryant. For vehicles, there'd be a Police Spinner or two and the Replicant's Shuttle (the one they used to escape).
3 3/4" Seven Samurai - Kambei, Gorobei, Shichiroji, Heihachi, Katsuhiro, Kyuzo, and Kikuchiyo for sure. Toss in some bandits for them to fight and some villagers for backgrounds and that'd be sweet.
I would buy both of those lines in a heartbeat.