100 Thieves has seen the biggest growth in esports in the last couple years by far, so seeing them take a stab at making a game doesn't surprise me:
I think that it's still very early on in development but the real news is that they seem to have hired Pete Holey to be Chief Product Officer for this game. If I were to guess, this will most likely be a shooter, with Nadeshot being a former COD pro player and now being in love with Valorant... But who knows what this game will be?