I'm sure I'm like a broken record here but Master Chief NEEDS some love here. It's such a hole in the collection. And, at the least, the investment in tooling can be recouped with Red/Blue, and some basic armor variations much like McFarlane used to do. know that would be a gargantuan commitment to pull off, but I can hope.
I'd also really love a Deus Ex Adam Jensen but I think that ship is long sailed give that the entire next game and stufio got screwed over.
But as far as Uncharted goes? I think the problem is that any secondary character is going to be a hard sell without the face of the franchise readily available. Especially because when it comes down to it, it's an old guy with a mustache and a chick with a tank top, provided you're not connected to the franchise.
No one is buying those two on their own - in other words, Lim is largely maxed out on their ROI based on how many Nates are out there, and not every Nate buyer will purchase side characters.
An option, perhaps...do an Uncharted 2 or 3 Nate, and then release Elena and Sully to match that preorder. Offer a preorder/deluxe bonus option for those who have the U4 Nate which has the U4 costumes included for the figures.
I mean all things considered, I'm sure LIM has at least floated the idea of another version of Nate given the success of this one. I'd love an Uncharted 2 version most of all.