Although it has faced difficulties over the last year, Riot have continued to produce new champions and skins for League of Legends.
However, it has now emerged that an as-yet unannounced rework is coming in 2022, to accompany the Udyr rework already announced.
According to Riot's Lead Champion Producer, Ryan "Reav3" Mireles, Lead Concept Artist Gem Li (Ezreal, Sett, Senna, Vex) is working on the rework, which as always with Riot, is subject to change.
All we know at the moment is that this update is in the early stages. It's somewhat pointless to try and guess, given the sheer number of champions that the community would likely say need a rework.
Reav3 has said that the next champion roadmap will be published later this month, revealing what kind of additions will be made to the ever-increasing roster.