I feel that it's quite safe to say that no, D:OS 2 is not getting an ATB bar. There was no indication during the Kickstarter and development of D:OS 1 or the kickstarter of D:OS 2 that Larian was exploring any other options than pure turn-based combat.
Such things cannot just be added into a game midway through development, as the balance for turn-based, real-time, real-time-with pause, and ATB-based combat systems are quite different and contradictory. You can't just take skills and enemies designed for pure turn-based combat and switch it up to ATB combat without doing a complete rebalance.
If you hated the turn-based combat so much that it kept you from finishing D:OS 1, I have to wonder why you backed the kickstarter for D:OS 2.
