During the Nintendo Direct, two new Ultra Beasts were revealed. They are UB: Burst and UB: Assembly. Nothing is known about these Ultra Beasts other then their names and which games they will appear in.
UB: Burst is a Pokemon Ultra Sun exclusive Ultra Beast. It appears to resemble a clown, and has a detachable ball on it’s head.
UB: Assembly is a Pokemon Ultra Moon Ultra Beast. It resembles a fortress and is probably going to have high defense.
Along with these, some new gameplay footage was shown for Ultra Sun and Ultra Moon:
It shows some new areas, as well as showing that there is a new Pokeride Pokemon, Mantine. While it might be the diving Pokemon, it would have to be the diving and surfing Pokemon, so maybe it is replacing Lapras or Sharpedo.
Other then that, there is not much else new. Glad to see some new news for Ultra Sun and Ultra Moon! Hope there are many more features to come!