Sure, Lil' Judd can probably be the antagonist for the next story arc, but how about having him use a bunch of freaky fish-cat combinations as his minions? With the Inkling-like enemy this time being a new species being Cuttlelings who hate Inklings and Octarians alike, so the Cuttelings work with Lil' Judd to get rid of them. This would provide a test for a new possible playable species. I prefer for the Cuttlelings not to be able to produce any tentacle-like creature, because that's the uniqueness for Octolings only and it should stay that way, and because I would rather not have a carbon copy of the Octarians for a new antagonistic species.