Play! framework - backward compatibility

I'm currently developing a new website powered by Play! framework 2.0 and I have two questions:

is there going to be a newer version in the near future?
if the answer to the above is "yes", is there going to be a backward compatibility?

Solution

Branch 2.x is current, newest stable version and there are no plans for new one.

You can use it, and I think that it will take at least long years for next revolutionary edition.