Captain Venture and the Planet Princess were a pair of adventurers who traveled through the solar system in the 30th century. Battling opponents like King Leon alongside allies like the brilliant Tazon and the Rolan Patrol, Venture mirrored exploits of his cosmic twins Lightning Lord and Rex Cosmos of Earths One and Two. Princess Zyra, the last survivor of Saturn-S, she was as heroic as Saturn Girl and diametrically different from Eviless of those tell parallel planets. These were the Earth-S version of the Legion of Super-Heroes and Space Legion of those alternate realities.
Contemporaneous to the exploits of Venture and Zyra is the misadventures of CapMarv aka BillBat, who was the 30th century descendant of Billy Batson and heir to the legacy of Captain Marvel. While only possessing a limited power set until Marvel traveled to his time and educated him on how to properly access his full super powers, BillBat nevertheless was the first of a series of costumed crusaders who would protect this future era as had the Marvel Family and Squadron of Justice in the 20th century.
Tazon was the intellect as was dopplegangers Braniac Five, King Leon was the sinister version to his cosmic twins Sun Boy and Blaze Barton. The Rolan Patrol like the twin Legions were the dominant protective forces of its sky ways.