TeamSuperman:
superman
wonderwoman
martian manhunter
captain marvel (shazam)
orion
big barda
the flash
green lantern (hal jordan)
aquaman
Thanos can take them all?
Please guys, you're really underrating the JLA and really overrating Thanos.
Orion himself, forget the issues in which he's written in a crappy manner is stronger than Superman, he possess superhuman invulnerability, durability, reflexes, endurance and stamina.
Post Crisis Superman is the powerhouse we all know.
Martian Manhunter has same powers of superman except for superspeed on the ground and heat vision, but he's one of the most powerful telepaths in D.C. Universe.
Wonder Woman is around 60/70% of Kal'El's powers.
Big Barda is weaker than WW but is still a force to reckon with.
Flash is a powerhouse with so much powers at his disposal he can manage to make Thanos becoming crazy while trying to figure where he's going.
GL Hal Jordan is one of the most powerful heroes and his power ring grants him to enhance himself as Thanos can with the Cosmic Power.
Aquaman is hella strong actually, he can lift almost a city, he's hella durable, and his telepathy is outstanding.
They are too much for Thanos.
Superman and Orion can engage him in a slugfest that will go on for a long time especially if Orion enters in Berserker Mode, Superman in a all out fight showing his strenght will become something that Thanos must keep attention to, meanwhile WW can distract him or tie him up with her lazo, Flash and Hal can blast him with Speed Force and GL Ring, Flash can perform the IMP, MM can aid Supes and co. in the hand to hand fight or perform with Aquaman a powerful telepathic assault, that will slow down or anyway hurt Thanos, the mighty Titan is going down, this is the JLA, not the New Warriors, they aren't like the Avengers, where only Thor and Hercules can show their own with Thanos.