Board Thread:Versus Debates/@comment-26636534-20170804145715/@comment-25122992-20170806210458

Firstly, the OP specifically states it's Gaara without Shukaku, and, secondly, there's no reason to believe that Shukaku could've decided to return into Gaara, since he didn't voice any intentions of this sort at all, unlike Gyuki and Kurama.