I’ll argue against the inclusion. If the entire sequence as a whole is shown at the beginning, then the Ep5 flashbacks feel mostly redundant because the viewer already saw that sequence in its totality. If the film already establishes that Obi-Wan and Anakin were friends and that Anakin is aggressive early on, why show it all over again but cut up?

Maybe the flashbacks in the Jabiim section could be significantly trimmed to their most essential elements. “How do you know, Obi-Wan?” -> 5 seconds of Obi-Wan and Anakin smiling at each other. “He will start his siege” -> 10 seconds of Anakin going aggro on Obi-Wan. But at that point it would be cutting down arguably the most compelling scenes of that part of the story as well as the audience novelty of seeing a brand new Anakin and Obi-Wan prequel scene. So I’d argue there are too many drawbacks.

If it must be included at the start, the best alternative imo would be to just tease it in short clips - like 3 seconds of Obi-Wan and Anakin sparring on Coruscant, 3 seconds of Mustafar duel, 3 seconds of Coruscant smiling at each other, 3 seconds of Sith Anakin screaming at him - basically interspersing a couple brief snippets in between the prequel flashbacks. Then later the viewer gets to see the sparring flashback in its entirety when it’s directly relevant to the plot.