Powers & Abilities Captain John was the original shadow fruit user. Also Blackbeard is likely collecting all old Xebec fruit abilities

[IsaziSempi]

That xebecs member. In the SBS we learned that he died protecting his treasure. It's likely that the next fruit user was on the island when he died and the last known person to be by his body was Moria who .. ended up with his body. We also know that Kaidou probably killed Morias crew and Moria has no problem killing the crewmates of others so Kaidou could have killed Moria's crew as a homage to his former teammate. On a side note, many have theorized that Xebec had the Darkness fruit and if that's true then the only missing DF that we know of is Big mom and shiki's fruit. Blackbeard might actually resurrect the Rocs pirates.

 

[NAMELESS]

Interesting theory.It would be cool if we got BB vs Shiki.Big Mom could also be killed while the straw hats are in Elbaf.

 

[KonyaruIchi]

I really like this theory. Wouldn't surprise me if BB's whole crew concept is based on Xebec because of how much of a legendary pirate he was, it'll be interesting to see what he's actually trying to do in the NW.

 

[Warchief Sanji D Goat]

Would be cool if this happens.

 

[Finalbeta]

In before Xebec was his father all along