It can still happen without Japan Studio but the problem is that FromSoft is bigger beast then what they were when they made BB. So it's up to Sony to show interest in the project and bring them a truck load of money because From seems to be doing just fine on their own while making multiplat games. I'm thinking that theyll make another New IP together but they are probably going to ask for a similar deal like Kojima in order to be allowed to put the game on PC.I'm completely lost for words, does that mean no Bloodborne 2 ?
There's also the possibility that From just have too many projects on the pipeline so even if they want to make a sequel they are just too busy on their own projects.