As part of the acquisition of Nintendo by SEGA, a new 2D Mario game has been announced. However, this one will feature Sonic the Hedgehog and Tails as well. It will be called Super Sonic Bros. Dr. Robotnik (yes, they are using the original name) has finally obtained all the Chaos Emeralds and is using their power to merge and rule the multi-verse. Since he's always been foiled by his nemesis Sonic, he has decided to join forces with Bowser, King of the Koopas in order to beat him once and for all. Sonic and Tails, knowing they can't beat both of them, enlist the help of Mario and Luigi, champions of the Mushroom Kingdom in order to even the odds.
The game will feature exciting new gameplay from both franchises. It will feature tight platforming and awesome power-ups from the Mario Series and blazing speeds and "blast processing" from the Sonic series. The heroes will also be able to exchange powers, the main draw of the game, by dressing up as each other. For example, if Sonic wears a Mario Suit, he will be able to move like Mario and use all of the Power-ups of the Mario Universe. If Mario puts on a Sonic suit, he will be able to move at blazing speeds and collects rings in order to stay alive.
Sounds like an interesting new direction for both franchises. Stay tuned for more.