Even Standard 2022, the new MTG Arena format which only includes cards that will be legal post-rotation, seems to be falling into some familiar archetypes- Izzet Dragons, Mono Green and Mono White Aggro are all doing quite well so far- although they look quite a bit different without access to powerful cards from Eldraine, Ikoria, and Theros. Thus far, much of competitive Standard and Historic look pretty much the same as before.
Over the last weekend, the first tournaments featuring cards from Adventures in the Forgotten Realms took place, giving us a first look at what the competitive formats might look like going forward.