To play Devil's Advocate, I wouldn't be at all surprised if Thomas Polito's info is actually legitimate. The more likely concern IMO is that it's incomplete and/or outdated a bit. As others brought up before, his list of finalists for Batman was somewhat accurate, but it blatantly missed the guy who wound up getting the part.
A similar scenario seemed to have to have taken place more recently with his report that Jamie Foxx and Giancarlo Esposito were names he'd heard for a particular role, which was almost certainly for Commissioner Gordon, a part that came down between Mahershala Ali and Jeffrey Wright.
My guess is that the names Thomas got for Catwoman are also accurate and not by any means the result of him making stuff up as a number of folks here seem to be implying. But it's most likely not up-to-date and likely also incomplete.