Bandai held the announcement event yesterday, and with Unicorn's author as one of the guest, you can see it coming: the next project will be a feature film set in the Universal Century, U.C. 0097, a brand-new story with a new Gundam, plus the famous RX-0 Unicorn third unit. We definitely looking forward to its release in November 2018.
Moreover, Bandai will begin the next phrase of future projects under the Universal Century timeline, from U.C. 0100 to 0123. For the time being, these can be anime/game/novels/manga. Definitely an exciting time for old-time fans.