No decision has been made on this but we've had some brief discussions on it
What most likely we'd do is when a stable 2.0 release is made, and has been out for a few months we'd do an upgrade on a test server and see how it affects .net websites and applications such as DNN. If we encounter zero issues, and 2.0 is backward compatible, we would upgrade our production servers. If not, we'd only introduce it on new servers