Andy 28!
Goomba
Here is my concept, is very original (I think)! Bowser's Fury 2. Is like the 3D World side game but a lot more complex, is a open world game where Bowser is again in his Fury phase but this time isn't fault of Bowser Jr, the game is'nt focused on the Cat theme instead is in the Mushroom Kingdom! You can play as 7 (8 in the last island and post game) characters: Mario, Luigi, Peach, Daisy, Rosalina, Yoshi, Nabbit (easy mode) and Bowser in the last island, there's also 8 partners and 35 different islands, the game not has any power up, and also there's a multiplayer mode local for 2-4, every character has a unique ability, Mario: Fire, Luigi: Thunder, Peach: Umbrella, Daisy: Double jump, Rosalina: Spin, Yoshi: His tongue, Nabbit: invincibility and Bowser: Shell. The villain is Bowser but after defeating Fury Bowser the game reveals that the main villain is Fawful! He put Bowser in his Fury form, the final boss is Fawful controlling the Mecha-Fawful, the game has 25 bosses, so that's my idea, sorry if I said too much, so what you think? This sounds good? You have any idea? Please share it!