Though earlier reports suggested that the entire Jersey Shore cast would be replaced for the show’s third season, TMZ says that the Situation, Snooki, Pauly D, and JWOWW will all likely return. Second-season footage shot so far of Sammi, Ronnie, Vinny, and Angelina, however, has underwhelmed MTV execs and the four “should be very worried,†according to a source. Well, not Vinny, who always has Harvard to fall back on. [TMZ]