Re: Rainman wants you!
I would love to see a Hot Toys ET does happen, because I don't see Rainman doing it, but I doubt anyone would really take that on. Too bad Johnny Depp didn't make his film debut there. I would strongly consider a classic Samus, or a classic Mega Man, which could be amazing (I was so sure Hot Toys was going to do it after they did Astro Boy. . .). But they don't seem like the kind of thing Rainman collectors go for.
If you factor in the "cult movie" or "psycho killer" aspect (the bulk of Rainman character choices), the idea that it's very difficult and unlikely to be done elsewhere, and something that could benefit from Rainman's strengths, the list gets pretty small. Even with Jimi Hendrix (putting aside the fact that he's not from a "cult" type movie), the main, distinctive Rainman contribution would probably be the guitar--something Serang outsourced. And I'm sure that guitar would kick all kinds of ass, but. . .
Wasn't someone soliciting interest in an Iminime Last Samurai? Maybe without the armor though? It was on the SSF survey of potential Rainman projects that the Dude won years ago, so that's been a long-standing idea among collectors.