This is one of the Things I'm dying to see done. I know they arn't that popular and allot of people consider them lame. And hell i won't pretend they are like my favorite characters.
But this is really something i can see the horsemen go off on so much. Theres huge potential with what they have to work with, and i think they can make these guys that no ones ever been big on and transform them into super grade a stuff. Theres all the rock texture along with robotics and what not, just so much to work with.
I predict we'll get them cause i can see them making a base body for these guys, and i know they can at least use it twice, but they may make a generic rock trooper too. They'd probably use the same arms and legs, but they'd give them new chest parts and new heads.
I'm not sure on the transformation, I'm like 65% thinking they wont do it. But transforming something into a rock seems dirt simple, compared to like transforming into a jet or something. So it has that going for it, but like i said i'm doubtful.