The longer they wait, the more expensive its going to cost. Same thing has happened with the new alumni center. That building should have been built years ago, and now its going to cost roughly 15% more just due to the university waiting.
As Thunders said, I'll believe it when I see shovels in the ground, that's going for the baseball stadium as well. I know its coming, but I'm not holding my breath that it'll be anytime soon.