It has been reported by Game Revolution as well as Kotaku that QLOC, a polish company responsible for porting games is going to be handling Dark Souls Remastered instead of FromSoftware.
Kotaku reports that QLOC is the company of choice to bring Dark Souls Remastered to the Xbox One, PS4 and PC, this has not been officially confirmed yet but even if this isn't fact, QLOC would not be a bad choice. Games such as Injustice 2 PC, Dragon's Dogma: Dark Arisen PC, Dead Rising HD Remaster, Resident Evil 6, Devil may Cry and Super Street Fighter IV: Arcade Edition are some titles that have been ported over by QLOC, this shows that the company already has a few good titles under their belt.
Adding to the mystery of how Dark Souls Remastered is going to be ported over, is also the concerns of the Nintendo Switch version. According to both Kotaku and Game Revolution, the Switch version of Dark Souls Remastered is being taken care of by a unnamed Chinese company, this has also yet to be confirmed.