I suspect he's probably right, but I don't put much stock in what a mayor says about his city. He's going to put the most positive spin on any story as possible. Remember the San Antonio mayor in 2005.
Honestly, I don't mind seeing a team move back to L.A. I just prefer it be a team that was in Los Angeles previously or already in California, rather than the constant move threats for teams like Minnesota, Buffalo, and Jacksonville.