By now the remakes should have been released, if Grezzo started developing them after Awakening.
I also believe there are some royalty issues with Capcom. With the exception of Four Sword Adventures, Nintendo games never directly referenced characters, weapons or plot points of Capcom games. You would expect the Four Sword to appear in TotK with other legacy weapons, and Vaati to get at least a cameo in Hyrule Warriors, but... nothing. Musics from Capcom games were also never featured in Smash or in a Zelda concert.
Re-releases are probably fine, but using existing elements in new titles or remix them might require to pay Capcom some money.