It starts above with the State of Play trailer.
Then Sqaure Enix has a collation of all the previews on their offical website:
https://www.square-enix-games.com/en_GB/news/final-fantasy-vii-rebirth-coverage
This covers the mission with Sephiroth and exploration of the Junion region. I really liked Maximillion Dodd's gameplay analysis.
Then we have the TGS stage demo of the 'grasslands' region:
Lets talk about it!!