There is a different side story in 3.1 which wasn't mentioned in the latest live letter for some reason. It's supposed to be about the students in Ishgard attending some school or whatever. They've likened it to FFVIII. I'm not sure why they aren't talking more about it, unless the beginning of the side quest is somehow related to the MSQ. We should have the school sidequests, and more post moogle sidequests.

As for Hildebrand... did anyone do the Mor Dhona sidequests from 3.0, that feature the Doman children starting their own adventurer's guild and investigating mysteries? That storyline ended with a cliff hanger, and the plot really seemed to be Hildebrand-esque. I have the feeling they are setting up the plot of a future Hildebrand investigation, much like when we had to rub body lotion on Godbert back in 2.0.