Imagine this. It’s several years in the future. You live in a newly completed residential tower in Baltimore’s Inner Harbor, and you need groceries. You take the elevator down from your 32nd-floor penthouse apartment, step outside to where the Harborplace pavilions once stood, and look around. Where is your car? MCB Real Estate — the firm that wants to raze the tourist destination’s struggling pavilions and reimagine Harborplace — proposes constructing two apartment buildings on Light Street along that waterfront that would include a total 900 units.