The second map includes Phase 2 routes currently under construction. The good thing about these google maps is that I can update them as more lines become operational.
The third is my speculative map of possible Phase 3 routes. My previous post about Phase 3 plans explains the speculative origins of this map (click here to go to that post), though a recent article in the Hindustan Times also supports these speculations. Again with this map I can keep updating the routes as we get to know more about them.

I couldn't link anymore to the Hindustan Times article, but here's the map from that article.