Gender: Female Location: Poppin Pills on the Rainbow Bridge
JSA vs Thanos
The Justice Society of America - Alan Scott, Jay Garrick, Wildcat, Hawkman, Hector Hall, Power Girl, Mr. Terrific, Sand, Stargirl, Doctor Mid-Nite
In character; Thanos has 1 week of preparation time; Standard equipment; Post-Crisis JSA, 616 Pre-Secret Wars Thanos
Blood lusted; Thanos has 1 week of preparation time; Standard equipment; Post-Crisis JSA, 616 Pre-Secret Wars Thanos
Bonus. In character; Cosmic Cube Thanos; The JSA are joined by Atom Smasher, Captain Marvel, Hawkgirl, Hourman and Obsidian; Post-Crisis JSA, 616 Pre-Secret Wars Thanos
*If Thanos stomps the bonus round, the JSA are also aided by Jakeem Thunder and Damage.
In the first, I'd take Thanos. He has the prep, and he'd eventually wear down Alan. Only Fate is a tricky threat from his perspective, and Hector's showings aren't necessarily the most reliable. Everyone else is just a nuisance to Thanos.
The Thunderbolt is the only one that could conceivably match the Cube in a reasonably well-fought matchup, so Thanos stomps the bonus round and probably whips the JSA even with the final additions. Too much he can do before Jakeem has the Thunderbolt account for everything.