Before we even get Lego Super Mario Bros Minifigures, at least we have these from Ming Ge.
Ming Ge MG1581: Super Mario Bros Minifigures with Bowser Build Preview
Kopf KF6184: Legend of Zelda Minifigures Preview
Kopf makes their own Lego Legend of Zelda set before Lego did, assuming they will in the future.
WM WM6103: Super Mario Bros. Minifigures Preview
Various characters from Super Mario Bros as Lego-compatible custom Minifigures