- Galaxy 2 takes place in an alternate reality where Mario and the Lumas never met
- the big Luma owns Spaceship Mario, which was transformed into its shape from a simple planet
- the big Luma is known as 'Lubba'
- Lubba needs power starts to fuel the ship, which Bowser has stolen...alongside Peach
- What does Lubba say when he transforms the planet into Spaceship Mario? "Nice spaceship, huh? More like a FACEship!"
- 40+ galaxies
- the tree slide that appears in some trailers is a star available in TreeTrunk Galaxy
- Expect more Yoshi action than was had in New Super Mario Bros. Wii
- Spring Mario only makes 2 appearances
- Luigi becomes playable in some fashion once you reach 20 stars
- Another playable character is hinted at for when you reach 120
- A monkey known as "The Chimp" let's you play minigames
- good amount of 2d portions
- expect many throwbacks to classic Mario games once you hit the later stages
- Bowser stages are similar to those in Super Mario 64