I don't have a next fight. If I'm going to fight for something, it's going to be something a whole lot more important than computer software. Free software is here to stay. Success has occurred. I'm not going to grope around for another fight. Instead I'm going to harness my software freedoms to write software that does what I need it to do.
To me, a big one is ownership: who really owns/controls the things we purchase?
As for free software, consider that desktop computers are rapidly becoming less and less relevant to consumers at large, on average, yet they are also becoming one of the last holdouts of free software. Of the devices being produced and sold today, what fraction are free and what fraction are locked down? How do you expect that to change tomorrow?
Also, speaking of desktops, don't forget laptops.