After you and Tirion establish the new Lich King, and "hide" your secret Bolvar is left to himself.
Now with this picture, could it be a foreshadowing of a future event?
Bolvar in this picture looks pretty distressed. Not in a bad way though. Why would he be looking at his hands if he were struggling in a losing battle?
It looks like Bolvar just pooped his pants a lil. He's been playing a Paladin since Vanilla and is amazed at how much power he has. He's probably going to overcome some leftover remnants of Frostmourne or Arthas, but he's gonna win and help us someday. Either that or he can become the next Earth Aspect (through a ritual of course). Either him or King Magni, because he's pure stone (or maybe when Bolvar gets back he's gonna be like "oh I know someone who can help lol").
Personally I'd like to see Bolvar and Alexstrasza free Magni, and then someone goes:
"All this destruction...someone MUST repair it."
Alexstrasza: In a world where we can find able-bodied warriors from all sorts of life, can we not find just one to replace them? Wait. What if-
Bolvar: What if what you need was not life, but death?
Alexstrasza: Paladi-Young one. I assume you understand?
Bolvar: "Yes. I wish to rid myself of this curse. I have...seen atrocious things being done by my new...relatives and their heartless leader. I wish no more part in it."
Alexstrasza: "You may lose your grip on these creatures but they will still need guidance."
Bolvar: "If it must be done. I will do it for the sake of guiding all those lost souls to a new dawn, forged by fire and rock."