Vegas deadline is real

As mentioned in my post on the Vegas situation, Sin City Mayor Oscar Goodman has set a 12-month window in which 18 acres of Union Park development will be available for a sports facility. Goodman clearly wants a MLB team to relocate to Vegas, but this deadline makes it awfully inconvenient for MLB and other sports who want to use Vegas as a pawn in negotiations with other cities. Would a team suddenly announce a relocation in only a year? It doesn't sound likely given the often glacial pace of venue negotiations.