Twitter user Halston was able to spot a product listing for Sackboy: A Big Adventure (which has now been taken down). The Twitter thread revealed a bunch of information about the PS5 launch title (which is also launching on PS4), but the most important takeaway is that the game will apparently launch with a Special Edition that includes a Tiger Sackboy plush.
Sackboy: A Big Adventure is a little bit different to that of the previous Little Big Planet games. It’s more of a strict platformer similar to that of Super Mario 3D World. It will let you play with other players as well.
https://press-start.com.au/news/playstation/2020/09/18/all-the-ps5-launch-titles-that-we-know-about/