Fear no more: Fiasco’s Pericles is a revelation, a revivification of New York theater’s most essential ensemble and a redemption for a play seldom produced and even less seldom praised. Things, though, do start out somewhat unconvincingly. Pericles is thought to be a collaboration between Shakespeare and George Wilkins, an abusive innkeeper whom scholars think probably was running a brothel, and it’s in the rather un-Shakespearean first act (typically attributed to Wilkins) that Fiasco unsurprisingly finds the greatest challenge.