THE GREAT BIG MALL-AND-SPRAWL GET-TOGETHER What do The Galleria, the Houston Premium Outlets mall in Cypress, the Katy Mills mall, the Deerbrook Mall, The Woodlands Mall, the Baybrook Mall, First Colony Mall, the Willowbrook Mall, the 11,400-acre Bridgeland development way out 290, and 42.5 percent of The Woodlands Operating Company have in common? They’ll all be owned by the same company — if the Simon Property Group completes the proposed $10 billion buyout of bankrupt General Growth Properties it made public yesterday. That would make 550 Simon malls in all — more than a third of the U.S. total. [Developments]