Yeah there were some rumors along those lines, but primarily related to very early builds (the wiki image thing was debunked, if I recall correctly) I have to imagine there is a substantial difference between crude early work and the final product, and we don't know how advanced those builds were, they very well might've been just proof of concept prototypes.
I wouldn't necessarily put too much weight into that as the basis for believing that a port was intended, since Bloodborne was developed around the change of the generation and it's very possible that those builds were just them trying to get some work going while waiting to get their hands on the development resources and tools for PS4.