>>38955895First year of the new gen is always Regional dex on VGC anyway, this could be part of the reason why they are doing this. And second year of the new gen is always National Dex format, so they could bring all/more mons back then.
Also in general I am going to enjoy both singles and doubles with a fresh metagame, where some of the old good stuff will kind of "rotate out" like in tcg, for temporarily.
If you thought that this is bad for the metagames of competitive, WRONG, this is great from competitive aspect, pic related.