Everyone hates Ramsay Bolton. EVERYONE. Constantly toying with every one of his enemies makes for a dastardly villain. The Battle of the Bastards sees him sitting on his pedestal with, you guessed it, Jon Snow ready to take on an entire army -- only for everyone behind him to come right at the last second and begin a ferocious battle.
Cavalry units against one lone soldier could make for some hilarious results, and with Jon Snow being who he is, we’d have to give him some crazy amounts of power. Timing the battle so that Jon’s last minute “rescue” could be recreated would be an epic scene, and bringing in some of our favourite ogres yet again could help to add an extra bit of sparkle to the bloodshed.
In true UEBS fashion, we’d also have to take full advantage of the fact that Ramsay Bolton would be sitting on a horse somewhere. Perhaps we could make our fantasies a reality and let our overpowered Jon slice him (and his horse, because why not) to pieces... well, at least we know that outcome was eventually a reality in the end.