So why is he the only one of the big three that wanted to continue on in the MCU?

Downey is done. He made more money than he could possibly spend, he's too old to keep playing with prop guns and he absolutely hates the character.

DISNEY IS NOT TAKING GUNS TO ANOTHER COUNTRY JUST TO FILM.

Because he finally gets to have fun with the role. Thor was a very boring character until Ragnarok so Hemsworth hasn't really played fun Thor for all that long.

There are entire cottage industries of European Film Armourers, not to mention studios regularly cut deals with gun companies. No excuse.

I thought la goblina was taking over as Thor?

Forever really as an AI all he has to do is voice act maybe a hologram appearance with the Tron de-aging tech Disney has laying around. If he wanted to stsy on board the writers could make it work, he would almost assuredly have to take a pay cut though

It's a play you fucking pleb.