Thanks to the fine folks over at Serebii, we have some tentative names of seven new Pokémon that will appear in Sun and Moon. These are translations from the Japanese video, and as such the names could change for the English versions. They include: Drama, Togedemaru, Vikavolt, Cutiefly, Bruxish, Charjabug, and Tapu Koko. All images below are from Serbii.
To see these new monsters in action, take a look at the Japanese video released by the Pokémon Company. This new trailer shows off some of their abilities. Once an English trailer is made available we will update.
[UPDATED 7/1/16: ENGLISH TRAILER]: