So, let's speculate about future Story developments (SPOILERS!!!)

[Balipu]

take over the world or destroy the world are basically the only 2 threat scenarios in the whole FF series.

Or ascend to godhood. Kefka fans like to gloss over this slice of information, but Sephiroth never intended to destroy the world. He counted on the lifestream saving the world from Meteor. That's why he moved to the cave where the lifestream will burst out. To merge with it and become all powerfull. Of course in the end he probably would have conquered the world as well, but the first step was godhood.

EDIT: I want your mask.

On Topic:

As for Hildibrand Season 2...

Episode 1 we focus on a case to find Hildibrand and the legendary sword Excalibur while running into Greg again. To find them we use the Hildibrand Thinking Emote and at the end of the episode we get one cliffhanger and the Hildibrand Thinking Emote (aka /hildythink) as our reward.

Episode 2 we meet Briardien again for the next case and he tells us how Ellie is doing during his time in prison then continue the search for Excalibur. Once the case is over and the next cliffhanger is done we are rewarded the Adjust Glasses Emote (aka /adjust)

Beyond this I do not know...

I doubt it. Excalibur is already wieldable as a zodiac brave weapon so serching for a weapon you can find 10 copies of in Revenant's Toll would not be a compelling story.