I'd like to think he'd take the smart, less traumatic option and plea out in exchange for life imprisonment, like Gary Ridgway did.
But everything I've seen said about him to me suggests an arrogance, a sense of superiority and entitlement that reminds me more of Bundy. A man who enjoyed the theatre of his multiple trials possibly as much as the murders he committed. Not to mention the theatre of his appeals, the constant interviews with media, biographers and profilers, and the fan mail from women pathologically attracted to dangerous men.
Bundy also had a mother who loved him, who begged from the depths of her soul for his life. He had a long term partner with a young stepdaughter, and then, he married another woman and fathered a child while incarcerated. Every single one of these people, he protested his innocence to, right up until the end, until it was completely clear he was not going to dodge the chair. Then, only then, did he tell his loved ones that he was every bit as much a villain as he was known to be. He didn't plea to spare them anything, though he could have. Tactically, it would have made more sense to plead guilty. He might be alive today if he had. But he was having too much fun.
I think BK is going to enjoy it all.