Originally posted by Utrigita
But the IG was only extent to the 616 reality wasn't it, Thanos couldn't jump into different realities like the infinites apparently can.
We also have to remember that Thanos only wanted One Universe.
When Eternity and the rest went to the Living Tribunal for help, he said he would not interfere, because Thanos only wanted Eternity's position, (One Universe)
I'm sure Thanos could have taken most of the Universes in Marvel if he wanted to, he knew it too.
"Supreme being in This, and All Universes"
There are less than a handful of Characters (IMO) that did Not appear in the Infinity Arc that Potentially MIGHT be able to stop him,
but who knows.