Last year, we shared our goal to deliver one champion per role each year, with the exception of mid lane where we target two—one for assassin and skirmisher players, and another for mage players. We planned to continue that this year, but sadly it looks like we won’t get there. Both of the champions we planned to release towards the end of the year were originally meant to tie into an event, but as development went on it became clear they didn’t quite fit. We felt good about both champions’ directions and didn’t want to change them to fit in with the event, so we decided to stay true to their characters. As such, we’ll be releasing the ADC early next year and the support a few patches after. We’re not sure how this will affect our schedule for 2022 yet, but it’s possible we may release an extra champion next year. We should have a better idea by the next Champion Roadmap and will share more then.
https://www.leagueoflegends.com/en-us/news/dev/champion-roadmap-september-2021/
Both teasers are piltover and zaun so I couldn’t see anything that doesn’t scream Arcane since it’s the only big event left for 2021