While that could be a great direction I'm not so sure about its implementation. You'd have to create a new set of APIs accessible to another language to work with Android and then convince people to move codebases that have existed for years at this point to a new language.

Granted they can work to make bridges, support both, etc but if the ultimate goal is to transition it's going to take a very, very, very long time.

But I'd love to see what they would come up with for this hypothetical transition :)