The Royal Shakespeare Company will bring its big London hit “Matilda” to Broadway early next year, issuing preemptive confirmation of the much-anticipated news ahead of the imminent start of adult auditions for the Gotham incarnation.RSC hasn’t yet chosen an American producing partner for the Rialto transfer; it’s expected the org will figure out a precise plan of action in the coming weeks. Based on the Roald Dahl novel, the much-lauded musical bowed in 2010 at the RSC in Stratford-Upon-Avon prior to the current West End transfer that began in October. Adaptation of “Matilda” has a book by Dennis Kelly with songs by Tim Minchin. Matthew Warchus helms the show, about a book-loving young girl whose mysterious powers help her triumph over a dastardly headmistress. London incarnation is produced by the RSC with Andre Ptaszynski on board as exec producer. With preliminary auditions for adult roles to begin next month, the timeline for the Gotham version of “Matilda” would see the tuner land on the Rialto in early 2013. Theater, dates and other details remain to be set.