 But this only underlines the legal reality that the controversy alleged in the complaint may well depend on what the reach and impact of the federal law will prove to be in this case.Because the District Court had disposed on the case on a motion to dismiss, the Supreme Court reversed and remanded for further proceedings.Justices Rehnquist and Powell concurred separately, emphasizing their understanding that the majority's holding would not apply to ejectment actions brought by non-Indians.