Pokemon Sun and Moon was a great pair of games! (Except for the lack of post-game, that part sucked) And Ultra Sun/Moon looks AMAZING! Here's some last minute possibly unrealistic hopes for the pair!
Expanded regional pokedex, I'm like talking at least 430 pokemon.
BATTLE FRONTIER! Seriously, who actually bothered with the battle tree?
MORE STUFF TO DO!
MORE Customization!
MORE STUFF TO DO!
More Z-Moves!
More Megas! Gamefreakpleasebringbackmegaevolutionnobodycaredaboutzmoves
MORE STUFF TO DO!
Expansion on characters and trials!
MORE STUFF TO DO!!!!
Reply with your own hopes for Ultra Sun/Moon!