In particular, a court need not resolve whether it has authority to adjudicate the cause (subject-matter jurisdiction) or personal jurisdiction over the defendant if it determines that, in any event, a foreign tribunal is the more suitable arbiter of the merits of the case.
In particular, a court does not have to decide whether it has the power to adjudicate the matter (subject-matter jurisdiction) or control over the defendant if it determines that, ultimately, a foreign tribunal is better equipped to settle the dispute's essential points.