Somewhere I heard that Kevin Feige said that two of the MCU actors (don't remember if "Avenger" was specified or not) re-upped their contracts. I haven't seen anything else about this, & considering how much pub this stuff get's, it'd be huge news if it were true.

I could imagine Hemsworth being one of the actors to re-up. He still seems to enjoy being Thor & I imagine he might be able to pull in some RDJ type money in a new contract.