DC HEROES RPG LEGION OF SUPER-HEROES SOURCEBOOKS
MAYFAIR Games produced
two volumes of the LEGION OF SUPER-HEROES SOURCEBOOKS,
and used this poster to promote them.
The image was lifted from the cover of VOL
II of the series, drawn by Ed Hannigan and inked by
Jose Delbo.
Inserted into that particular volume was a loose
double-sided poster of LEGION HEADQUARTERS.
See
here for more information on RPGs.