Go back and read his tweets again and think about it; he has very little, if anything, to lose by saying what he said yesterday. Again, very little, if any, will be verifiable now and after the bid process is complete. Anyone bidding basically has to "present plans to stay in Buffalo long-term." For purposes of the lease and the fan base (think ticket sales) no prospective owner- with years left on a seemingly iron clad lease- is going to outwardly say they are buying the team to move them.
These tweets don't really tell us anything we don't already know and give him ample opportunity to claim victory when Pegula or Golisano get the team.