“Not since Delia Rigal,” comments one of La Cieca’s regular correspondents, referring to the ongoing (not to mention inscrutable) publicity juggernaut for soprano Erika SunnegÃ¥rdh. Now she’s headlining a revised concert program for the Met Orchestra at Carnegie Hall on May 14. According to an “URGENT” press release sent out yesterday, La SunnegÃ¥rdh will be heard in three operatic excerpts by Puccini, Mozart and Wagner. Her assisting artists on the program, Ben Heppner and Rene Pape, each will sing two arias. Changes to the original roster for this concert include James Conlon substituting for James Levine, Giacomo Puccini for Johannes Brahms, and Piotr Illitch Tchaikowsky for Charles Wuorinen. That’s at a $155 top, by the way. See you there?