Yes, in addition to other internal Sony support teams, plus Sumo Digital and other external outsourcing teams.
There is no new Bluepoint title, they moved away from remasters and remakes, and don't have enough designers to be the lead studio of their own game. They must be working again as a support team as they did in GoWR.
According to their game credits and double checked via their LinkedIn CVs, during Demon's Souls their entire studio was working on it. During GowR, their entire team was working on it. There wasn't anybody left to work on an additional project.
That artwork was a random placeholder artwork for when they didn't know what their "original content" they were working on after Demon's Souls, which ended being GoW Ragnarok.
I'd sell them in to two SKUs, each one being a remastered trilogy.
But if they have enough people, they could remake them one by one to milk them more, starting with GoW 1. That would also help to censor the games and pussify Kratos following the trend of the recent ones.