JANUARY MAN: A killer comedy that has an ex-cop trailing a serial murderer... and the mayor's sexy daughter!  Kevin Kline leads an all-star cast that includes Susan Sarandon Mary Elizabeth Mastrantonio Harvey Keitel and Rod Steiger.    FATAL INSTINCT:  Carl Reiner directs this side-splitting spoof that stars Armand Assante Sean Young and a host of familiar faces in a series of suspense-thriller parodies.