In terms of its current marketing so far, I think this would fall under exploitation of violence.
There's no juxtaposition to it aside from what we've seen in the trailers, with characters we have no attachment to aside from Ellie from the previous game, but we have no attachment to TLOU2 Ellie as a character because we've only seen a small amount of her from TLOU2. That will probably be delivered in the game, but right now it's violence we have very little context for.
You can look at the recent Wolfenstein games as an example of how the juxtaposition and context is important, when the game regularly has you dismembering Nazis through the course of regular gameplay with grenades, hatchets, shotguns, etc. which you can classify as exploitation of violence but in an extremely ludicrous way and not trying to treat it with any gravitas. Thus the juxtaposition of when they use up-close and intimate violence with gravitas the impact is even greater regardless of if its BJ doing it or the Nazis doing it you feel disgusted, because its so rarely used in that fashion throughout the game despite ultra violence being present 100% of the time.
In TLOU2 if the intimacy of the violence showcased in the trailers is a regular occurrence throughout the entire game some people will likely be desensitized by the end of the game, despite going "that's gross and makes me uncomfortable" at the start of the game.
