The movie wrapped things up rather nicely. But there were an awful lot of loopholes.

For example, the fact that Tempest Shadow got off with the equivalent of a full amnesty. Along with the Storm King's army. Also the small fact that the newest Princess of Equestria tried to steal the an ancient artifact from the hippogriffs. Also the rampant destruction of that bordertown. And also the harboring of pirates.

There's a lot of things that the world would like to taalk to Equestria about.

The sole two diplomats of Equestria talk about how much they would rather not talk about these problems and complain about crap.