A big open space most Angelinos have never heard of is slated to be the location of a 32-acre state park--unless it replaces Dodger Stadium in Chavez Ravine. That's a proposal by one of three architectural design teams asked to draw plans for the Cornfield, a former railroad yard between Chinatown and the LA River. The winner will be chosen tomorrow. We hear what the competing designs look like and what's at stake for downtown LA.