505 Games just announced a worldwide publishing agreement with Psyonix for Rocket League. This agreement will bring Rocket League to retail stores worldwide. The retail release will be called Rocket League: Collector’s Edition.
This retail release includes content from all three big DLC packs and has some unannounced retail exclusive bonuses. Rocket League: Collector’s Edition will be available at participating retailers in Q3 2016 for PlayStation 4 and Xbox One only.
Source: God is Geek