Last month, Grub Street learned that the mysterious restaurateurs going into the old M. Katz furniture store at 146 Essex Street were “pretty big people” in the food world. Now a Bowery Boogie tipster suggests that it’s none other than Stanton Social’s Chris Santos, whose previously address-less (and still nameless) restaurant is already garnering hype: The Post devoted a feature to Santos last week, who plugged his “more serious, more sophisticated” venture. [Bowery Boogie]