So it seems that there will be one set of Triple changing Constructicons released for ROTF Devastator.

Legends Class Combiner

All seven Takara EZ figures can transform from robot to alt mode, to combiner component, and all in the legends size class, something that Hasbro could not, or would not achieve in larger scale size classes.

And if these get a Hasbro version release, would make for one of the cheaper combiners in recent times.