Ha, ha. Am not sure about the whole focus on dolls.... :-)
Just imagine the fun the creators could have with Sheldon and Kirk (could Kirk be allowed to sit in Sheldon's spot: "I have the helm, Sheldon!") or with Sheldon and Spock (would Sheldon ever wash his hands, and is this meeting what brings about the court order?).
Seriously, I am sure that Nimoy is aware that his legacy would grow to where we have moved beyond where the sky's the limit. And if nothing else they could just have Shatner persuade him... having persuaded Nimoy to do so many strange things, although probably not the ballad of Bilbo Baggins... ;.)
As to Leonard... well, I always find him best when is nervous and dumbfounded. So many possibilities there with Shatner and Nimoy, don't you agree?