Just speculation, not an official one. Maybe the restriction will lift up early.
Then I hope that this speculations might come true because Japan's fighters Naoya Inoue and Murata are one of the most awaited fighters inside the ring and probably their scheduled fights are one of the anticipated fights of every boxing fans. But I can't deny that between GGG vs. Murata, GGG is still powerful and steong fighter though our speculations may only be corrected once we see them inside the ring, but as of now I am in pro of GGG.
Inoue might be the best in his division but I don't think Murata could dominate the fighters in his division, with GGG, that would be a big hindrance for his success and I'm sure you know that the fans believe GGG would easily beat Murata. I can't wait to see this fight because I'm expecting a KO from GGG to prove to those who doubts about his capacity despite his age now.