Might get 3 quid total, if you're lucky.
Personally I don't see the point of PS4 versions but at least it's all three games together so it's far less insulting than a single PS3 game redone for PS4 at $40.
Oh and there have been Dark Souls III rumours swirling, haven't checked to see if any of that was ever confirmed. I think they are trying to keep it under wraps for E3 (has that started yet?).