No, i´m the one who claims that it should have both and that Retro should´be been expanded years ago.
But of course does a console need a diverse library to attract a large amount of customers and releasing nothing but colourful 2D/3Dn Jump´n´Runs doesn´t really help since they mostly appeal to the same audience.
Hey make no mistake apart from Mama Robotnik I do'nt think you'll find a bigger Prime fan here.
Retro is big enough to have more than DKCR:TF going on at the moment, they were already big enough to have other stuffs done when they were doing DKCR.
But sometime projects don't always work out.
I'm fairly sure the other game they were making was cancelled or reworked (or maybe they're helping doing new MK like for MK7).
Another Metroid game is long overdue but clearly not from SPD.