I've been calling it for ages now
I am of the belief Full Power Death Devil will scale to Low 2-C and Denji/Pochita will scale to her
Probably Yoru/Asa will now too
Depending on which kind of Low 2-C, I could see it.
Type 1: No Uncertainty, Pure Feats. As in, there's gonna be a zoom-out to space as Death's Door opens, and the Universe gets Thanos'd. (Least likely)
Type 2: Some Uncertainty, Statement Based. Like, if Hell is a separate universe, and each door is a devil's personal domain/apartment they dwell in they can exit, like when Darkness fell outta the sky, but Death currently so powerful that she has to stay inside her room or else Hell would be in turmoil. (AKA Toggle1's Death headcanon, less unlikely but still unlikely)
Type 3: Lots of Uncertainty, Translation Based. As in, if Death is said to be able to destroy the "world," but the term for "world" in Japanese has multiple possible English meanings, and everyone argues over which one is accurate. (A definite possibility)
Type 4: Maximum Uncertainty, Pure Bullshit. As in, Darkness Devil-esq inexplicable imagery that could be interpreted as Low 2-C, like if Death is woman sitting in a movie theater, and removes the reel of film from the projector, and suddenly the manga panels are just black for a bit. (My personal favorite, would be very toner-expensive when printing physical copies though...)