Fantastic Beasts Secrets of Dumbledore was very good. It's underrated and if it fails Warner Bros may cancel Fantastic Beasts 4 and 5. I would hate this because the Direction, Acting and Writing is very good. Plus although the last two movies had mixed reviews. The final movie will probably have better reviews because it will have been set up by the last 4.
Secrets of Dumbledore was very good. It tied loose ends left by Crimes of Grindelwald and the plot was fantastic. The side character Bunty was given an important role in the 3rd one. I'm glad this happened. The Walk of the Qilin Ceremony was extremely well written. Mads Mikkelsen did a fantastic job as Grindelwald. The battle between Dumbledore and Credence was awesome.
If Fantastic Beasts 4 and 5 are cancelled at least this will be an ok conclusion. Perhaps, if this happened JK Rollings could take a break and rewrite Fantastic Beasts 4 and 5 as a novel that could eventually receive an adaption. But I personally love the direction of Fantastic Beasts. I would rather get two more sequels then let the franchise end. However, if Fantastic Beasts 4 is Very Bad then we would be better of if Warner Bros Quit with Secrets of Dumbledore.