Support for any Django version (or any version of any other WSGI web framework, actually) can best be provided by simple third-party open source adapters, rather than waiting for any given version of any given WSGI web framework to be included in the App Engine SDK and servers. For example,
https://potatolondon.github.io/djangae/ says:
The intention is always to support the last two versions of Django, although older versions may work. Currently Django 1.7 and 1.8 are supported. Django 1.9 support (master) isn't too far away!
Alex