No, Duke Nukem Forever was cancelled. All their devs migrated to VALVe. That's why Ep3 is taking so long.
They're waiting for us to get everything working well again, before releasing another engine to screw us over.
Minerva was great. But some of the vertical areas pissed me the fuck off. When you play HL2 you expect foes to come at your from the front, the sides, behind, never above.