Tyson Fury was a significant factor in his success. Due to their controversial fight, he is now getting big opportunities that long-time boxers work hard to secure, but Ngannou easily attains. He is also fighting a former champion now, considering AJ was a champ before. Winning here might open up more opportunities for him, and that means more financial gains. He's not going back to where he started since he is becoming a star in boxing already, if he is not considered a star yet.
We need to understand that Ngannou has generational talent and he is also in the heavyweight division which makes him unique he gives Fury a fight he could never forget because the judges saved his record on that fight. Between him and Joshua, he is stronger and this is an easy fight for Ngannou because he is eager to win in boxing he was not satisfied with the judge's decisions in his last fight which makes this fight even more interesting because he trained well to be able to secure the win and continue his popularity in the boxing industry especially in the middle east.
Not really sure what you mean by generational talent, but obviously he was gifted with that huge power that can knock everyone out, as he proved it in the case against Tyson Fury wherein he scored a knock down.
He wasn't able to sustain it though in the fight, he might get tired as it is a full 10 rounds and I think that will be one of AJ's strategy here. Avoid that power of Francis and have him tired in the championship rounds and AJ taking over and winning in the judges scorecard.