"The Brute Battles On!"
The Galaxy Master, a God-like entity who can assume any form, roams space, destroying all civilizations that it finds in an effort to become supreme. The exception to this is the one race that he subjugated, who serve him on his quest. The Princess of this race sees the Hulk as their potential ally to win their freedom. Her Uncle, the Warlord, has grown rich in his servitude to the Galaxy Master, and wants no change. So when the Galaxy Master cannot do any better than reach a stalemate with the Hulk, the Princess starts a rebellion, hoping to tip the odds. The Warlord betrays her, but, ultimately, the Hulk rescues the Princess, and destroys the Galaxy Master. The Hulk is sent home-bound on a rocket, but when he changes to Banner, he finds he can't long survive the cabin conditions. 20 pages.
Reprinted in Marvel Super-Heroes (1967) #66 Reprint notes: 18 of 20 pages (omits page 12 and 16); figure of the Hulk redrawn on cover reprint.