Personally, I was actually looking for an alternative to react some time ago, on the grounds of that "BSD License" + "Patents" that facebook has got on it. From what I know no, nothing has happened yet, but for peace of mind, having an alternative would help.

FYI, What I found was preactjs which is a 3kb with most new es6 features of react which I've started using in my project. Unfortunately, I haven't found an alternative to react-native yet.