Reverse Planche/Back Limber

Hi everyone, I remember a post where Coach talked about front limber/reverse planche and back limber to be required for his athletes since they are fundamental components of GST. I am not trying to ask for details that have not yet been revealed (because I know you won't do it  ), however I was just wondering, are they going to make an appearence at all in the upcoming courses?

I'm thinking they could appear in M3. F4 is a prerequisite for it and after the FL>iM progressions found throughout the F series, we'd definitely be ready to take on this kind of work.