My willy wonka knowledge is close to 0, i didn’t really like both other movies tbh. Whwn i heard there is a new one i really didn’t care for it at all. Now i kinda want more, but i’m not sure if the height of his success would be very interesting. I think they only ever talked about it. All we know (i think) is that he really wants nothing else but making chocolate, and chocolate for everyone, and he doesn’t care about the bottom line. In the other movies he’s a loner and only hangs out with oompa loompas vecause he doesn’t trust people (i think). So the in between would be the betrayal or why he’s choosing to be a shut in weirdo.
Now thinking about it, wonka isn’t really a prequel, it’s a different story, because in the last one his father was a dentist or something who didn’t want him to chase his dreams.