I wouldn't count on it. Dark Souls is an old game and didn't look great even for PS3 standards. I think we can expect a similar port to Scholars of the First Sin.
That would still be great. Its my favourite game of all time and I've never played Artoria of the Abyss DLC and in 60fps so this is a must buy for me. At launch on PS4, and during the holidays on Switch for the portability.