What's next?

With a group of friends, we started a vanilla world. At the point we're at now, we've launched 1000+ rockets, have hundreds of bots doing their work, train stops that activate and deactivate when necessary, full solar panel powered and artillery outposts that make sure no biter nest exists within the boundary of our pollution cloud.

Which brings us to the point that we feel we got everything out of this run that we can.... And wonder what now? What do you think is the next step for a challenge that doesn't make it so complicated that people stop having fun?