So, here's some random ideas on what Nintendo could do with the series with regards to spinoffs and remakes, as it's probably going to be quite a while until we see another mainline entry after BOTW2.
A Link Between Worlds was a direct sequel to A Link To The Past, correct? What if they took that approach with Ocarina of Time and made a third game in the vein of OOT where it's a smaller but denser map with plenty of dungeons? As much as I've been praising BOTW, it'd be cool to see another game in the N64 style.
Similarly it's not too late to make an actual full 3D Wind Waker sequel, I know that Toon Link's story continued on DS and wound up with him back on dry land, but they could simply have a game set between WW and Phantom Hourglass or just come up with some reason why he finds himself back in the ocean again after Spirit Tracks, I loved exploring the ocean in WW and was always sad I never got to do it again.
At the very least some remakes of Phantom Hourglass and Spirit Tracks on the Switch in the vein of the Link's Awakening remake would be cool, I always thought it sucked how they wasted WW's art style on the DS's 3D which didn't look good even at the time, it should have been high quality pixel art ala the Castlevania follow ups on DS or at least a mix of 2D and 3D ala New Super Mario Bros, though maybe Phantom Hourglass should instead be remade as a fully 3D game and proper sequel to WW.
Finally is returning to Termina as a setting a good idea? Part of me feels it should be left alone so MM continues to be very unique, but part of me thinks it'd be cool to see Termina done with more modern graphics, should a BOTW3 be an open world Termina? What if the WW sequel was toon Link finding himself in an ocean version of Termina? (this is what I assumed would happen prior to TP's announcement)
Those are my crazy ideas, thoughts?