AFC and two, maybe up to four in the NFC.
KC and Baltimore in the AFC, and GB, Niners, and maybe the Eagles and Rams in the NFC.
Lots of teams likely to make the playoffs just aren't SB contenders. Josh Allen is too erratic for the Bills, plus their defense can vanish at times. The Cowboys are gonna Cowboy. Miami, Cincy, Cleveland, Houston, Jacksonville, Detroit, TB, NO, and Seattle don't have all the pieces they'd need.
Best bet is KC vs Baltimore in the AFC championship, and GB vs Niners in the NFC. I think that would lead to KC vs GB in the SB.
But that's the start the season. I won't be surprised if the shine continues to fall off of Purdy and the Niners drop off as the season wears on.