Current. The version currently attacking Ittadori in the manga.
Since Naoya is allied with Yuta, and Naoya is trying to kill Megumi, I'm pretty Sukuna will take over Ittadori, have an encounter with Yuta and Rika (the King of Curses vs the Queen of Curses), grab Megumi, and leave.
Basically, I see Sukuna overwhelming Yuta in a brief clash of sorts and then leaving to save Megumi.
It's possible though that we get an extended fight between them, in which case I see Sukuna dominating.