With the Nu just opened, the Sheraton recently topped off, and Indigo at the foundation stage, you might be forgiven for thinking that there was enough hotel capacity in the pipeline for Downtown Brooklyn. Well, at least one developer thinks differently. SM Hotel Management, controlled by the Mehta family, paid $11 million for the 80-by-197-foot lot at 300 Schermerhorn Street last October and has just broken ground on what will be a 14-story, 247-unit hotel being designed by Gene Kaufman. Do you think Brooklyn can absorb all this hotel capacity? GMAP P*Shark DOB