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This First scan holds importance towards the battle with BZ. Now from the original scan the white zetsu told Madara that the insides were in good shape. Which left me rather puzzled about its meaning. However in this scan WZ states that the battle will improve because the base is good material. What difference does this make? Well, when you call something a base it means you plan on using it to create something else, so since Obito is the only thing in that direction. It is safe to assume that BZ is gonna use Obito for more than getting the Rinnengan. If I were to guess I would say that they are going to use Obito as a base for creating a new White Zetsu original. With a new white Zetsu original a new fray of White Zetsus can be created in an instant (zetsugasm) this will provide enough cover for black zetsu to escape in the confusion