Reference to the November blog posts: https://www.warlight.net/blog/index.php/2014/11/
Quoted: "This isn’t related to this update, but I have news that I’m thrilled to announce about WarLight: WarLight now has an investor! For the first time in its 6-year history, I’m not working on WarLight alone. For the last few months, we’ve been hard at work on WarLight 3.0. More details about this will be coming soon."
Take that as you will but Mercer is also in the staff group (so I think there are 2 people working on Warlight now)