Think about it... Obito is its Jinchuriki because he sealed it with his Kamui.
Kakashi has the same Kamui dimension!
If Kakashi isn't already one of the Juubi Jinjurikis, then there's a pretty good chance that he will keep the Juubi after Obito's killed off, and/or once he leaves the Kamui dimension.
Kakashi has the same Kamui dimension!
If Kakashi isn't already one of the Juubi Jinjurikis, then there's a pretty good chance that he will keep the Juubi after Obito's killed off, and/or once he leaves the Kamui dimension.