Depends what's on sale - but I'll buy Baldur's Gate 3 soon or at release, maybe Starfield too depending on performance.
I'd really love a game that's playable on the Steam Deck on the TV though, Rocket League and SpeedRunners has been great for this. Even moreso if it has local multiplayer.
BattleBit Remastered has been really fun with M+KB recently (and they backed down on the anti-Linux anticheat for now), I wish there were something similar for sports games just focussing on fun over realism, like the old SNES football and hockey games. Something like Mario Strikers but where you manage a team and their stats and abilities, etc.