A rehaul of the Homeworld 2 Star Wars: Warlords mod that will take advantage of the Sins of a Solar Empire engine to provide a larger strategic theater and will adapt the gameplay to best fit the newer engine. The current public version works for Sins of a Solar Empire: Rebellion 1.80+ and all DLC.
This wasn't easy to pull off, and contrary to what these pictures show, there still is a lot of work to be done. Lots. No ability/buff files have been converted over, but I have the planets, ships (no abilities for these two), particles, and sound/music in.
If it weren't for research being totally broken (read: virtually non-existent) and all the militias being vanilla Rebellion units, you could play an Empire vs. Empire game.