I wouldn't count Enterbay out as long as they have YJ Park. And I'd expect that Arnie will deliver the projects he's started for Enterbay, unless Hot Toys buys them from Enterbay. That's the next 1/4 scale bust with the lats pose, and a battle-damaged GOD 1/6 figure.
It's funny, but Arnie has mentioned in his blog (or maybe Lalla's blog) his interest in doing Reeve. A few months ago he also mentioned his interest in doing an Audrey Hepburn, which, although Rainman will get there first now, would certainly fit in with the Hot Toys Brando and Dean line. My personal wish would be for Arnie's Air Force One Harrison Ford. I have his SPR Hanks, and it's terrific, not a caricature at all.
Oh, and I wouldn't rule out Trevor doing something for Hot Toys. Andy B has worked for Hot Toys -- he did the Dallas head from Alien, and the Martians from Mars Attacks! so you never know...Trevor could get a call...