And that is why, in the past, I have said that if people want a downtown stadium they should plan for it NOW. Identify a location, secure the land in some manner, and be ready for funding, contracting, and construction so that it can be ready when the TSC lease expires.
It not that everything has to be completed ASAP. Take a few years to identify where the best, or two or three best, locations would be. So instead of trying to do everything in a span of one year, for once, the city can plan ahead and do it right.
I think if you were talking about a 5 year time frame, that would be fine. If you are talking about 25 years, especially when the existing facility is still undergoing renovations, it would be a very tough sell to say the least. First of all, you really do not want to tie up that kind of land for that period time in an area that looks to be some of the top real estate in the city. Second, twenty-five years from now, the real estate scene could change dramatically. I realize what you are getting at with the ever-increasing cost of land but, unfortunately, it's a damned if you do/damned if you don't situation. At best, the city could donate land as a park with the intention of using it later as a stadium but 20 years later, you'd get those who would say it's a travesty to destroy the park.