They will be coming sometime after Pre-season as the artists involved with those visuals were being used to work on pre-season (I have a theory that they've also been the ones working on art for the new games, but there's nothing to confirm that tbh so just saying the pre-season stuff for now).
Now that those are done and the new head of the project taking over from Meddler has been picked (
rework guy... which honestly hope he doesn't have to touch the update much if at all...), They should be getting back to work on those and we should be seeing something back on the PBE soonish (tm), along with an update for
along the same scope.
They haven't given an solid date of course as they can't really say for sure when the work will be done, so honestly at this point I suppose it just depends on how many new visuals and what's actualy being added (Meddler said there might be a few new lines for Wukong, which if he is being added to any other games could make sense as his VA would be in house atm) too decide when we'll see the changes come back.
But yea, in short they aren't canceled, just had to be put on hold for pre-season.