LittleBigPlanet 3 to be Fully Backwards Compatible
According to Steven Isbell, LittleBigPlanet Community Coordinator, all previously-purchased downloaded content and all of the collections from LittleBigPlanet and LittleBigPlanet 2 will be present and accounted for in LittleBigPlanet 3. His post on the PlayStation Blog assures fans that they won't lose six years' worth of collected costumes when starting up the newest iteration. In fact, you'll be able to import your profile straight into the game, so you'll be able to pick up exactly where you left off, especially when it comes to the custom levels you've published.
Isbell also said that a FAQ section will soon go live on LittleBigPlanet.com when it comes time to launch LittleBigPlanet 3, just to give clearer instructions on how to transfer content to the game, which will debut on Nov. 18, 2014 for PlayStation 3 and PlayStation 4.