My suspicions have been confirmed! The staff of New Grappler Baki: In Search of Our Strongest Hero will hold an event on Niconico on June 9, 2018 where they announce "unprecedented important" information about the series.
TMS Entertainment released a new trailer for Baki, this time introducing the heroes of the series. Character designs for everyone hero except Baki were also revealed.
A new trailer for the upcoming anime series, Baki: In Search of Our Strongest Hero, was released on Thursday. In this video we're introduced to the "Most Evil Death Row Convicts."