NawaiNey on 13 June 2017
No. They just tweeted this today:
Good luck to all at #E3 this week! No E3 for us as we are busy tapping away, getting ready to share more about #DreamsPS4 later this year!
— Media Molecule (@mediamolecule) June 13, 2017
They're making a single player campaign for it and they said it'll be created entirely with the same tools the players will have access to.