I do hope we get that orange with teal stripes Grim someday. It's something I bet FunPub might have done eventually, but with Hasbro it's a bit more of a longshot.
Hasbro did it in the Construct-Bots line. So maybe there's a chance.
I'm not convinced that wasn't a coincidence.
If he had the purple robot mode chest I'd be more certain it was an intentional reference.
He barely has any teal, some of which runs a long the torso of his beast mode, showing through in a manner that evokes the stripes. Seems pretty deliberate to me.
Also, they were cheap and saving the more-accurate purple chest deco for the Takara release. Typical Has-blow suxxors. :-P