> a centralized AI will be needed to coordinate all of the autonomous weapon systems

Why?

At a tactical level, an AI to coordinate a battlefield makes sense. (Speed of light means local computing has an advantage, particularly with directed energy weapons.) And an AI to advise on strategy, and coördinate those battlefield AIs, makes sense.

But while battles are mechanical, war is political. At the point that the human becomes replaceable we’d have an AI substitute for government, which is a long way away.

For grand strategic concerns, we have nukes, and those still fly slowly and detectably enough that an AI commanding counterstrike is unnecessary. (Unless submarine platforms become detectable and thus destroyable in a first strike.)

Why? Each individual system is more than capable of simply fulfilling tactics on their own. We're not short computing power! Central coordination is a risk to be avouded -- each individual drone can simply be Skynet all in their own.

The bad guys is the centralized AI.