Paper Mario: Worlds Collide is the 5th installment in the Paper Mario series and is set for release on the Wii U in 2014.
It's a sunny day in the Mushroom Kingdom. Mario and Luigi wake up at the time. Luigi goes outside to check for mail and notices a letter from Professor E. Gadd. It turns out that E. Gadd wants to show Mario and Luigi an invention he's been working on. Luigi shows Mario the letter and they make their way to Professor E. Gadd's lab. When they arrive, E. Gadd shows Mario and Luigi his latest invention, the GaddPorter X. The GaddPorter X is a teleporter that can send you to another world. E. Gadd asks Mario if he can try out this invention. Mario agrees to do it and enters the teleporter. Meanwhile, at Princess Peach's Castle, Bowser has arrived on his airship and is about to do something to the castle. Toad rushes to Mario's house only to discover that Mario is in Professor E. Gadd's lab, testing out a new invention. Toad hurries into the lab and asks E. Gadd where Mario is. E. Gadd says he is in the teleporter and is about to be sent to a different world. Toad then gets into the teleporter with Mario and tells him about how Bowser has arrived once again. E. Gadd says "Well now I guess I have two test subjects" and presses the button on the GaddPorter X that would send it, along with Mario and Toad, to another world know as "The Real World"...
Prologue: The Mushroom Kingdom
Chapter 1: The New Roomates
Chapter 2: The City of Sand
Chapter 3: Exploring the Reef
Chapter 4: A Stroll in the Park
Chapter 5: Gears and Stuff