No I don't think he is scared, however Black Beast is a serious threat to Ngannou, make no mistake about it.. he has huge power and his ground and pound is savage, he is not as fast as Ngannou but Ngannou can be sloppy at times.
IF Black Beast connects on Ngannou then yes he can absoutley win and be the new champ, the people who bash his skill level have been saying the same old crap and nonsense for every time he fights, then he always knocks the guys out and wins lol, its funny really
I'd go with Black Beast by TKO/KO ground and pound round 3.