Bloodborne IP was already owned by Sony. Hence why it's never seen a shared platform release, but might see a PC release since Sony has started releasing their first party titles to that platform now.
That said, with the success of Elden Ring and the reputation of FromSoft, I don't think they're a studio that will receive much direction of their games except "keep doing what you're doing". So if they go "We want to try something new now after Elden Ring and make a survival platform game!", they'll most likely get a message then from Sony/Tencent saying "No, you're making Elden Ring 2".
In the Elden Ring thread it was already speculated before release that it was highly likely that companies (most likely Sony) would proceed with buying up FromSoft stock based on the success of Elden Ring. Now that it turned out to be a home run with 16+ million sales, it's no wonder other companies also started buying like Tencent.