What should the next "new" project be?

Would be nice to have something with a server side component in Go and an Android part..

• A Go-based AppEngine server.
• Use Google/Android user authentication.
• A client/server MVP model (as much logic server side as possible.)
• Lua scripting for the gameplay.
• Short-range NFC exchange.

Note about JS stacks:

• Angular -- v1 vs v2
• ReactJS -- the cool new thing?
• this comparison and this one for a comparison with pros and cons. Seems to indicate to go with ReactJS.
• My take: looking at the source code being their respective home pages, the Angular one is impossible to read, the ReactJS is simple and natural. Go with the latter.