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.
Particularly, a court doesn't need to figure out if it can handle the case (subject-matter jurisdiction) or have authority over the defendant if it concludes that, in any instance, a foreign tribunal would be more suitable for resolving the core issues at stake.