Two of my favorite mags in the wake of Star Wars were Science Fantasy Film Classics and it's even shorter lived sister mag Incredible Science Fiction. The mags had high production values and were well written. What I found most interesting was that each issue featured a film from the '50s, one from the '60s and one fron the '70s (a current hit like Star Wars). Each issue also featured a fold out poster of original art (no great shakes), based on the current hit movie featured in the mag.
SFFC and ISF were both published by Ron Fenton in 1977 and 1978. Editors were Irv Karchmar and Curt Clemmer. The Art Director of SFFC was Michael Stein, who with Karchmar would start Fantastic Films in '78 and later, Stein would go on to create Filmfax.