I'm just waiting for Three Houses news. It was originally supposed to release in 2018, we first heard about it in January 2017, didn't see anything from it until last E3, and it's been dead quiet since.
Literally, this is the extent of what we know:
- We have a map of the continent where it takes place, Fódlan.
- We know the main characters from the titular three houses are Edelgard, Claude, and Dimitri. Dimitri uses a lance, Claude uses a bow, and Edelgard uses axes and swords. We know Edelgard is of the Aristocrat class, which is new. Based on her stats we saw she's very likely a prepromote unit, likely the game's Jagen.
- We know that Byleth is, in fact, an Avatar, and a teacher at this academy. Byleth uses a sword and may or may not be the true main lord. Depends on whether or not the trio is more like Lyn, Hector, and Eliwood, or more like Ryoma and Xander. Edelgard likely being a prepromote points to the latter.
- We know Combat Arts are returning.
- Shadows of Valentia/Gaiden's magic system may have been brought back.
- What looks to be one of the baddies has a whip sword.
- It looks like there may be some unique battle skills beyond normal Combat Arts, going by Dimitri leading a charge in the trailer. May be similar to previous games' Triangle Attack.
- A manakete-like character who looks an awful lot like Tiki is seen at the end.
- The Crests are to blame, and are very likely Fódlan's version of the Fire Emblem.
- Mercedes and Hilda are characters. That's literally all we know about them, other than the fact that Hilda shares her name with a character from Genealogy of the Holy War.
So yeah...not a whole lot, all things considered.