You'll see a lot of Bolvar. He's already depicted in painting form in Revendreth. They're likely to make him the Saurfang of Shadowlands. They even already have a cinematic model for him.
I'm not a fan of him at all, after his actions in Legion. Realistically, I'd plant an axe in his face, if he didn't give some "greater good" justification for keeping him alive. But, he'll be a big enough thing that I've even made a No Alpha Club signature with him as a theme.