Why? They were DF-less and now are part of the BBP, a crew famous for hunting DFs.
Hence they have a good chance of returning with powerful DFs from being BBP crewmen, as well as at least some haki for virtue of the timeskip.
I think it is fair to expect them to return as somewhat capable fighters. In every enemy, you always have some characters who betray the enemy and help Luffy. In the BBP you had Drake and Yamato. In the BMP you had Jinbe, Bege, and Pudding.
My guess is that the BBP traitors will be the Krieg pirates. While I do think the Krieg pirates will be strong, I don’t think it makes sense for them to return as strong as CP0 did. Hence rather than having a rematch with the SHs, they will help them.
I think they will probably return with zoans and/or ancient zoans. Their main strength comes from their weapons, so zoans would fit them best. Possibilities:
Krieg = Mammoth fruit ~ returns around YC3 level
Gin = Sabertooth fruit. ~ returns around Veteran level
Pearl = Axlotl fruit. ~ returns around fodder VA level
Hence they have a good chance of returning with powerful DFs from being BBP crewmen, as well as at least some haki for virtue of the timeskip.
I think it is fair to expect them to return as somewhat capable fighters. In every enemy, you always have some characters who betray the enemy and help Luffy. In the BBP you had Drake and Yamato. In the BMP you had Jinbe, Bege, and Pudding.
My guess is that the BBP traitors will be the Krieg pirates. While I do think the Krieg pirates will be strong, I don’t think it makes sense for them to return as strong as CP0 did. Hence rather than having a rematch with the SHs, they will help them.
I think they will probably return with zoans and/or ancient zoans. Their main strength comes from their weapons, so zoans would fit them best. Possibilities:
Krieg = Mammoth fruit ~ returns around YC3 level
Gin = Sabertooth fruit. ~ returns around Veteran level
Pearl = Axlotl fruit. ~ returns around fodder VA level