It actually was just dropped by Square-Enix inbetween. It was a trailer that got revealed at the Live concert tour of the franchise, RD. =3
They also stated there will be another trailer in July at D23 which will show a new world as well. ;3

EDIT: Here you go: https://www.youtube.com/watch?v=p51wHlWY1uM

I saw the announcement for a trailer next month...oh and undertale for the PS4 too did you see that trailer? Hilarious!

Yeah, I just clicked myself through a recording of the PlayStation event. There were quite a lot of intriguing trailers along with some surprises. Who'd have thought there'd be a remaster of "Shadow of the Colossus" so soon after "The Last Guardian".
I'm still looking forward to "Ni No Kuni II: Revenant Kingdom" which I still need the first game to play yet from. <X3

A relative of mine will most likely play loads of the games they announced here since they quite fit his game tastes and I think a lot of said games will also be entertaining to watch as a Let's Play.

Must admit since I don't own a Vita I personally would have prefered a Nintendo Switch or 3DS version of Undertale but PS4 is alright, too. I just say so because I usually prefer to play on the go and while I enjoyed playing "Kingdom Hearts: Birth by Sleep back then on a PSP the system itself lacked too much for me and up till this day I don't own many titles for the system which makes a PS Vita also not very interesting for me for the mostly same reasons.

Hrmm I didn't see the Ni No Kuni sequel trailer...wait a minute wasn't that awhile ago? nvm nintendo conference at 1PM my time, gotta remember that!

Well, there was a new trailer for that game.

Yeah, will be around 6PM for me. So far I've already watched trailers for "Mario + Rabbids: Kingdom Battle" and "Skyrim: Nintendo Switch Edition" which might get reused later on or not but definitely will be looking forward to the guaranteed trailer for "Super Mario Oddessey" and what else will show up. =3

While I'm not sure if it's all too likely because there were news regarding a mobile app for said franchise I'd personally get excited if there would be a trailer for a new "Animal Crossing" game for Nintendo Switch. I enjoyed the DS and 3DS one so much that I'd be all over an HD one with lots of new ideas and as many ways to customize and share the fun in multiplayer as well as having such a nice and relaxed style of playing solo. X3

honestly the biggest trailer for me was Monster Hunter Worlds. but they announced a lot of games I just cant ignore.

Ugh I overslept again! Surprisingly Nintendo is still doing their conference they just switched to their live treehouse show erm but yeah lots of games that are hard to ignore. It says day 1, is days 2 and 3 tomorrow or whatever?