San Diego has pretty much shed its image as a big small town, at least by the measure of potentially transformative proposals that could reshape the region for decades to come. Some of them are big and exciting, some big and scary— and often they are both. All of them are costly in terms of dollars and, potentially, in their impact on the land.

Whether they are the right things to do will be endlessly debated, even after some come to fruition — if they get that far.