https://www.gamespot.com/articles/e3-2018-halo-infinite-may-bring-back-master-chief-/1100-6459852/

Actor Steve Downes has voiced Master Chief in every mainline Halo instalment to date, and it appears that's going to continue with Halo Infinite. During E3, Downes strongly suggested on Twitter that he is coming back to voice the super-soldier in 343's upcoming game.

The Xbox Twitter account asked Halo fans, "Are you ready to get back to work?" Downes replied, "I was born ready." While not confirmed, it really sounds like Downes will be back to play Chief again.