I never thought of that! A soccer stadium on the south Midtown lot (20th St) and an arena on the north Midtown lot (22nd St).
In all reality, I think the people behind this team want a spot in the North Downtown, which worries me. I don't know how well a supposedly temporary stadium can (or should) integrate into a neighbourhood plan for a dense, mixed-use community. On the contrary, I think if City Council buckled to pressure to build there, that after the stadium and its generous outlay of parking and such is built there would be little room left for a North Downtown neighbourhood and the idea would fade away.
An urban neighbourhood is still a far better use of that land.