Okay, so my guess is they delayed this to coincide with a game launch.
Since WW and TP would just be simple ports, perhaps this is a spinoff or rather the new zelda game will be announced.
ToTK released on May 12th 2023. 4 years before the movie.
Perhaps they start marketing for whatever comes after ToTK and the movie is the announcement point?
Perhaps they release Links Awakening 2 around the time of the movie? Maybe release a TP/WW HD bundle that releases when the movie comes out. Maybe a new spirit tracks to tide us over for mainline zelda?