Heh, they kept the K. Rool mention from 2008 for a DK toy description in 2014. With this, the cartoon rereleases, the Japanese rereleases of the DKL trilogy, and K. Rool guaranteed -some- role in Smash, it's clear he's not "retired" or "being moved away from" or any conspiratorial BS. He's simply in the background while Retro dabbles with their own ostensibly creative replacements, biding his time before a Koopalings-esque return.
Are Tikis the only enemy in Smash Run to not have appeared in a major game since Brawl's release? Is their leader one of, if not the single biggest international first party newcomer request? Are Tikis the enemy race who everyone preaching muhrelevance claimed were being written out of any and all new roles in favor of wooden replacements?
No? Well then, enough with the false equivalence. Kremlings and K. Rool are in an entirely different boat than the Tikis and Tiki Tong, the Egg Robos and Robotnik, the Mets and Wily, the Sakurai Babies and Hades, etc. etc. They don't guarantee him playability, but literally no one is claiming this, just that it helps his odds, since if Kremlings are "an iconic DK enemy who are being added to rep DK," what light does that put K. Rool in as their leader (who's never not appeared in some role while his army are enemy mooks, mind you)? A pretty glowing one, IMO.