I think expansion will happen someday, but probably (hopefully) not for at least another 20 years. As several have mentioned, the Rays and A's are barely hanging on. Before expanding, first identify the 30 best markets in North America and put the existing 30 teams in those markets. Expansion should happen only if two conditions are met: One, there are 32 markets capable of satisfactorily supporting a major league team, and, two, there is a talent pool (especially pitching) capable of satisfactorily populating 32 major league rosters. It's kind of fun to think about what expansion might look like if and when that happens but it's essentially pointless until that time. I will say this, however. Instead of creating divisions and then deciding how the postseason would be set up, it should be looked at from the other direction. Decide how the postseason should be set up and then create divisions to facilitate that.