The lineup for the 1994 Playboy Jazz Festival June 18-19 at the Hollywood Bowl contains few surprises, several debuts and a smooth, fairly even cast.Heading the list of performers June 18 will be the fest debut of tenor saxophonist Joshua Redman’s quartet; the return of one of last year’s most galvanizing performers, Wynton Marsalis; and a group of vet players headed by Lionel Hampton. Louie Bellson, Junior Mance, Al Grey, Harry (Sweets) Edison, Pete Candoli and Benny Golson are expected to play with Hampton. Also in the lineup announced last week at the Playboy Mansion by longtime festival producer George Wein are fest debuts June 18 by Ramsey Lewis, Cassandra Wilson, Fourth World, with Flora Purim and Airto, and in their first joint appearance, Hubert Laws, his brother Ronnie and sisters Eloise and Debra. Spyro Gyra and Earl Klugh and Friends make return appearances. King Sunny Ade, the master of the Nigerian juju groove, is the world music ringer on June 19. Tito Puente’s Golden Latin All-Stars will feature Mongo Santamaria, Dave Valentin, Hilton Ruiz and Puente mainstay Mario Rivera in the ranks. New to Playboy June 19 are young guitarist Russell Malone, New Orleans clarinetist Pete Fountain, and the Marcus Roberts Trio. Joe Williams, David Sanborn, the Elvin Jones Jazz Machine and the Count Basie Orchestra round out the lineup. Bill Cosby will return as emcee for the 14th time. But not returning is the popular pre-festival Playboy Jazz Cruise, since the dining yacht from previous cruises, the California Hornblower, will be out of town and a suitable replacement could not be found. The Playboy Jazz Festival is produced in cooperation with the Los Angeles Philharmonic Assn.