Petroglyph is currently working on a spiritual successor to Command & Conquer: Renegade, Earthbreakers. Earthbreakers is a FPS/RTS hybrid in which players will have to protect their harvesters, build factories and vehicles, and assault the enemy base.
It is also up for Wishlists on Steam: https://store.steampowered.com/app/1188870/Earthbreakers/
Source: N4G PC Earthbreakers, a spiritual successor to Command & Conquer: Renegade, targets a 2020 release on PC