Seeing that I missed all the splatfests for Splatoon, I hope to participate in most for Splat2n. Even if there ends up being different events, or multiple events, like say an Octoling rush weekend where Octoling hordes take over the maps and teams of four have to survive to the end, with say 3 lives, and should any Octolings touch the spawn it counts as a loss. It sounds pretty ridiculous yes, but it would be an interesting co op, and could be a way to utilise the app.
Anyways, I don't mind too much if splatfests are region locked or not, but I'd be interested to see how it went with just European players.