The man who brought you Super Mario Bros. Crossover is doing something that I was not expecting. Not that it's a bad thing, in fact it is something completely awesome. Super Mario Bros. Crossover 2.o!
For those of you how don't know, Super Mario Bros. Crossover is a flash game, made by Jay Pavlina aka Exploring Rabbit, which is basically the original Super Mario Bros. with a twist. The twist is you have the option to choose from a variety of classic NES characters, from Ninja Gaiden's Ryu Hayabusa, Samus from Metroid, Castlevania's Simon Belmont and even the Blue Bomber Mega Man. Most of which control like their original game but with tweaks and abilities to compensate for how different Super Mario Bros. plays.
Super Mario Bros. Crossover 2.0 is basically the sequel of that. With more characters, different stages and, from what the trailer shows, different variations to the stages such as the classic 8-bit Super Mario Bros. look to the 16-bit Super Mario World look and even the original GameBoy Super Mario Land look. This game looks to be even crazier than the last. I don't know of those scenery changes will be active in game or if it was just for dramatic effect in the trailer, I do hope it's the former. I just gotta say, Exploding Rabbit sure knows how to make a trailer.
You can play the first Super Mario Bros. Crossover here.
Thanks to TupaSheep for showing me the trailer.