When Rebellion dug out the rights to Battlezone, they announced that they were rebooting the wrong Battlezone game – the Atari wireframe FPS rather than splendid ’90s FPS-RTS. They hastily added that they planned a “remaster” of Battlezone ’98, but it sounds like that’ll take ages.
For now, you might be interested in Warshift [official site], which sounds like Battlezone with an action-RPG edge. It’s an RTS where you build bases and armies but can also slip into units to fight on the battlefield yourself, then level up and customise them too. It hit Steam Early Access last night. Have a look: