I wouldn't hold your breath. They recently removed all mention of the Kickstarter they were planning for "Spring" from their website, as well as all Firefly material. I am guessing. Photos from the last gaming convention showed no game books at all at their booth, just fiction books. All that's left of Cortex on their site is this:
https://margaretweis.com/collections/cortex
Even people who were working on Cortex Plus games have got no response from them at all on anything. I absolutely loved the system but MWP has not only dropped the ball on Cortex Plus, the took the ball and launched it with a cannon.