I like the idea tbh but i have another one & it concerns all remaining BB Pirates
We have Van Auger, Doc Q, Burgess, Avalo Pizarro, Vasco Shot
These are the only ones with Unknown DFs & only Burgess is confirmed to not have found one yet
Seeing how Absalom was Sacrificed Off-Panel to give Shiryu his DF
I went & searched for all Minor Characters with DFs that Oda can Kill Off-Panel & their Powers fit those BB Pirates
(PS: I didn't count Minor Characters that Oda gave Closure to their Stories & Happy Endings such as Baroque Works Members or Wapol & also Villains who befriended SHs & don't deserve to die such as Foxy & Caribou)
Here is what i found:
Blueno - Very Good - Shu - Sharinguru - Blamenco - Decken - DD Pirates Members - Kelly Funk - Jabra - Dalmatian - Epoida
However it's obvious that BB Pirates cannot Steal from Characters who are Protected or Imprisoned by other Countries or Large Organizations so we should remove "Decken & DD Pirates"
Among remaining DF Users, i believe that these are the ones that fit BB Pirates Perfectly:
1. Burgess ---> He is Confirmed to haven't found his DF yet & we also know that BB Pirates are gonna fight Marines, so Very High Chance that Burgess will take Some Marine Captain DF & "Sharinguru's DF" fits him the best. He will be able to Spin his Arms & Legs increasing his Wrestling Fighting Style & Haki Swings to the Maximum Potential, he will deliver much Stronger Attacks than last seen
2. Van Auger ---> He is already an Excellent Sniper, what he truly needs is a DF that allows him to Protect himself from Attacks & shoot from different Places & that's why i believe he will take "Blueno's DF", this will make him an Extremely Troublesome Foe as he can open a Door from anywhere & Shoot & also hide when Attacked. IMO it's the Perfect DF for him
3. Doc Q ---> I don't think it's a Coincidence that this Doctor is Sick & Physically Weakened but also have a Horse with him who's name is "Stronger", this implies that the DF he needs is one which works best in a Duo, & that's why i believe Shiryu & Lafitte captured "Kelly Funk" in Dressrosa & gave his DF to Doc Q + The Horse might have eaten some Zoan DF (Similar to Chopper who should be their Match-Up). This way the Horse will become Strong & Doc Q can wear him
4. Vasco Shot ---> He seems to be the most Brutal Member of the Crew according to Viver Card & i imagine that he uses different kind of Weapons to Torture his Opponents, so i'd say he needs a DF that lets him carry many Tools & Weapons & it's no coincidence that Oda made him have a Large Neck, to allow him to later have "Blamenco's DF"
5. Finally i believe Avalo Pizarro will have a New DF just like Catarina Devon