The New York City Opera is betting that thrift-shop sales will soar by more than 40 percent, to $1.2 million a year, as shoppers and donors scared away by the institution’s 2013 bankruptcy filing come back, Crain’s New York Business. It may work out that way, but at least one skeptic has emerged: the New York Attorney General’s Office. In a recent court filing raising questions about the company’s comeback plans, the office said the thrift-shop revenue may have been “too generously estimated.” Bankruptcy Judge Sean Lane will decide how realistic he thinks the opera company’s financial plans are at a hearing Tuesday. If Judge Lane approves the plan, then City Opera would emerge from the financial wilderness just a week before the curtain is to rise January 20 on its first production in nearly three years — Giacomo Puccini’s Tosca at the Rose Theater at Jazz at Lincoln Center.