[This sounds like a checklist to compare with his world. Odin dead, no sister, Mjolnir lost, Banner alive, Asgard gone including the people.]

At least you're not the only survivor.

If you manage to get to my world, I'll get you a state. There's a lot of empty bits, but you might need to help put out the fires. My Thor would also be happy to see another Asgardian again.

[He's sure he can convince Steve to carve out another chunk of America for them. If not, he's sure he could buy it too.]