Mmmmm, wild boar. I'll tell ya, the best meal I ever had in my life was wild boar in a red wine sauce with bacon and, I believe, wild mushrooms. God it was yummy. Seems like a good recipe, too. Wild boar, check. Wine, check, although I'd use red, but it doesn't matter that much. Making the reduction in the pan you browned the meat in so you don't lose all that delicious browned meat flavour, check. Onion, check.
Not totally sure if I'm into the balsamic vinegar with boar--don't get me wrong, I love balsamic vinegar and would use it for a lot of things, but wild boar? I dunno. But it might work. I'm willing to give it the benefit of the doubt. All in all, this chapter's food seems like a winner.