UFC lead play-by-play voice and commentator, Jon Anik mentioned on Twitter, that he will be returning to the game and has already started on the voiceovers for EA Sports UFC 4.
While there are no other details, he does confirm the game is currently being worked on.
— Jon Anik (@Jon_Anik) April 1, 2019
After EA mentioned back in 2014, that the EA Sports UFC series could release every 2 years, EA has been fairly close to hitting that mark. The first EA Sports UFC released on July 17, 2014, EA Sports UFC 2 released on March 15, 2016 and the latest EA Sports UFC 3 released on January 30, 2018. If we were to guess a release for EA Sports UFC 4, it would probably be late 2019/early 2020.
We will have more news on EA Sports UFC 4 as it is revealed.