Supposedly I'm supposed to give a "credible" background for myself to prove I'm legit, though you have no way of proving it and it would only serve to screw me over in the long run, so I'll just say I work at Nintendo of America and have seen various documents regarding Sword and Shield whilst I was in the confidential room (a room where legally anything you hear inside can not be repeated outside). I kind of see a loophole in that nothing was SAID to me, I just read some things and saw some pictures.

Anyway, next Sword and Shield trailer drops on May 15, revealing legendary art (not animated) of a blue bipedal wolf whose arms are blades, and a red quadrapedal wolf covered in armour plating. Both have a medieval feel to them.

Didn't see about the starter evolutions, but there was a picture of a Magpie with a magnet-style beak which evolves(I think?) into what I can honestly only describe as a helicopter with a beak, and a fire goblin?

Didn't see anything about mechanics so I can't tell you if there will be new megas or z-moves but I doubt there will be any of this "armor" evolution I've been reading about here.

Just enjoy Detective Pikachu then you will get your info.