from an article on fightnews it sounds like his next fight is against Jonathan Oquendo, they don't mention anything about Concepcion but it does say on boxrec that he's fighting Concepcion then Oquendo.

Thing is they have the Oquendo fight exactly two weeks after the Concepcion fight so I would assume that Concepcion's been scrapped and he's just fighting Oquendo who's 14-1 9KO's.