Well, like 10 years ago possible contraction was discussed. However, even some of the teams that would seem to have been poorer, such as the Twins, Marlins, and Rays, have new stadiums lined up. The A's seem to be not well off right now, and I expect they will either get a new stadium or move sooner than later. The Royals seem to be relatively secure as well, having just completed a nice renovation to Kauffman Stadium. These things tend to sort themselves out.