You could have the prologue be the post credit scene from MS2 and open straight with this episode and flash back to the present day segment after fennec shows up. Or you could continue straight with what happens in 6-7…
Either way, this makes for a less fluffy - more action packed story.
It certainly adds a huge amount of Mandalorian lore and ties up the main loose end from Mando S2. My tactic here will probably to edit it in reverse. Start with the (presumably) 2 episode finale, then weave together this episode and the present day story from Boba and then add in sufficient Boba flashback scenes to serve the story.