Doesn't matter if its true or not, his contract is due to run out and, like any one of us, he will look to do what's best for him and his family.
If he looks elsewhere I doubt it would be Leigh, simply because like us, they won't know whether or not they will be in SL, and so cannot offer him SL wages. Unless they are mad, which of course no-one can rule out.
Even then, would he WANT another potential season in the Championship?
If the answer to that is a "yes" or "maybe, it depends", then it would be up to us, if we wanted to keep him, to make him an offer he couldn't refuse. He won't make any decisions until he knows what's on the table here, so it doesn't really matter whether there are any approaches. He doesn't strike me as the type to get "unsettled" by paper talk.