This coming season there will be two Theater Guild subscription plans, one covering the Kennedy Center Opera House and Eisenhower Theater, the second for the National.

"A Chorus Line," in September, and "The Wiz" will be the musical Ken-Cen bait, where four of the 10 offerings also will include Mary Martin and Anthony Quayle in "Old World," a two-character play by Aleksei Arbuzov, the most exported of contemporary Soviet playwrights; Zero Mostel in Arnold Wesker's "The Merchant"; Jason Robards in O'Neill's "A Touch of the Poet" and "The First Monday in October," the new play by Lawrence and Lee about the first woman Justice of the Supreme Court, to star Henry Fonda and Jane Alexander, currently appearing with Richard Kiley at the Eisenhower in "The Master Builder."

The National's series of four will be drawn from "For Colored Girls Who Have Considered Suicide When the Rainbow Is Enuf," "Spotlight," a new musical starring Dan Dailey; Eva Le Gallienne in "The Dream Watcher," James Earl Jones as Paul Robeson and, embodying songs by Cole Porter, a new version of John Van Druten's "The Voice of the Turtle."

The Kennedy Center 10-production price range extends from $76.25 for midweek matinees to $141.75 for Friday and Saturday nights. The National's range for four productions goes from $29.75 for midweek matinees to $56.75 for Friday and Saturday nights. Further details at 347-2433 or by mail at the Guild, suite 502, 425 13th St. NW, 20004.

Maine's congressional delegation is going all out for a "musical celebration" created by the Hyde School, of Bath, Maine. Conceived for the Bicentennial celebrations, "America's Spirit" caught on last summer in northern New England and response was so hearty that it trekked for three months. Now it will play free performances next Wednesday, Thursday and Friday at 8 in the Kennedy Center's Musical Theater lab space. Tickets are free at the Friends of the Kennedy Center desk in the Hall of Nations.

"Wings of the Morning" remains the title, but the script about the founding of Maryland is a new one by David F. Davis, which opened last night at St. Mary's City, Md. Kermit Hunter wrote the script for "Wings" first three summers, which Davis directed in '76. Performances are Wednesday through Sunday at 8:30 in this natural amphitheater on the banks of the St. Mary's River, site of the state's first settlers.

Catoctin Mountain Park, Thurmont, Md., is the setting for "Informances," Sunday performances from noon until 5 p.m. by University of Maryland Theater students about the park's history and people . . . Wye Mills Theater, off route 50 behind Chesapeake College, goes into its second summer with a revue, "Summer Song '77" by director Jim Mumford and CU's John Franceschina, playing Tuesdays through Sundays at 8. . . . Glen Echo Park is the setting for "You're a Good Man, Charlie Brown," played Thursdays through Sundays by Stage Door Players, a division of Adventure Theater . . . Alexandria's Puppet Theater resumes new adventures of Mr. Punch Wednesdays through Sundays at 815 King St.; phone 549-0787 . . . Silver Spring Stage Friday opens a three-weekend schedule for Oliver Hailey's "Father's Day," a comedy for mature audiences; details at 593-9855 after 7:30 p.m. . . . Norfolk has a new theater in the old Colonial off Granby Mall, with "Peace without Victory," about Woodrow and Edith Bolling Wilson.