The list has been updated...finally, a Legends Kickback!

A lot of the others sound pretty tempting too, as long as the execution is done well.
I always had a certain fondness for Triggerhappy's design, G1-esque Autobot and Decepticon Clones would be quite welcome (I like Paulbot's from-Twitter suggestion re. remold reuse), and the Powermaster Prime Diaclone homage is a pretty good idea repaint-wise - albeit it'd be better if it used the Ultra Magnus mold IMO.