I think her link with Elbaf would be used in the way to set up Giants as SHs allies like Doffy downfall made Minks potential ally to SHs.
When BM goes down this arc, Elbaf which had bad history with her would be more welcome to SHs when it is revealed thrybare reason behind takin her down, making em on good terms with each other.
Plus most of BMPs had showcased their skills in WCI and rest will in Wano, no reason to have one more arc just to see Snack n Struesson go all out. Katakuri n Cracker served their purpose, and Tomago we have seen gone all out.
Only valid reason, for BM return is Vinsmokes n Jinbei crew, which honestly could easily be handled in this arc itself, its totally in Oda's hands.
When BM goes down this arc, Elbaf which had bad history with her would be more welcome to SHs when it is revealed thrybare reason behind takin her down, making em on good terms with each other.
Plus most of BMPs had showcased their skills in WCI and rest will in Wano, no reason to have one more arc just to see Snack n Struesson go all out. Katakuri n Cracker served their purpose, and Tomago we have seen gone all out.
Only valid reason, for BM return is Vinsmokes n Jinbei crew, which honestly could easily be handled in this arc itself, its totally in Oda's hands.