The big problem is that Electronic Arts owns the rights to SMAC, and they're not interested in doing anything with the intellectual property.
I still can’t believe no one has made Alpha Centauri into a sci-fi Game of Thrones. The story and plot are great.
They basically did with CIV Beyond Earth. It was very mid.
There's Pandora that is a much better attempt than Firaxis' Beyound Earth, but if I may suggest, you shouldn't expect lightning to strike the same spot twice.
You can however hope that, just like with Civ1 (=> Civ2) => SMAC(X), someone will be inspired enough to take some of the best aspects of it in a somewhat different game :