Am I the only one who wants to see this picture of the supposed hybrid....??
As far as them being able to hybridize, I doubt it could it happen. The above reasons are all good reasons for such. I believe they are not closely related enough to be able to hybridize. They are from entirely different families so they are only in the same order and sub order..Squamata and Serpentes.
All of the hybridized animals I know of, have come from with in the same genus. A couple examples would be Muskie X Northern Pike, Lion X Tiger, Grizzly Bear X Polar bear, Ball Python X Blood Python. I am not familiar with any hybridization coming from the same Family but two different Genus. Not to say that it cant happen, I am just not aware of such of a thing.