
I would usually agree but since it's already passed 2 major arcs, the tone they've set has only been up to bloody battles that don't show dismembered limbs, a lot petty manipulation, and betrayal.
It's a light adventure-type fantasy, with alot of comedy and light hearted moments don't seem to go too dark unlike something like Goblin Slayer for example.
If they were going for rape and the like, they would have done it so much earlier. Plus their characters are so clear-cut good guy vs bad guy, not as gray as alot of high/dark-themed fantasy types which is why I don't really think the prince will get to that point.
What kind of revenge will it be? Huh king? ლ(´ڡ`ლ)