The Mario Bros. franchise has come a really long way from the days of two tiny Bros flipping and kicking turtles and crabs and such down in the sewer.
The Mushroom Kingdom, and everything to do with the Super Mario Bros. universe, has been expanded by dozens of titles and tons of peripheral content which has brought every bit of that colorful world to life.
Fans have suspected for a while that the entire Super Mario Bros. franchise could be linked together into a somewhat cohesive storyline, but where would this tale trail begin?
According to this comprehensive and lengthy video by Scorpigator Films the story didn’t start with Mario Bros. but rather on Yoshi's Island, and there's still plenty of room for expansion in the story of the Bros.
-Via Polygon