So I gots it. Totally a Little Mac main, his ground game is just too phenomenal. Super armor on smash combined with just the right launcher amount at early % means he can get an easy 40-60% combo off, which is already his kill zone for <= mediums, and the heavies just get bodied by his ledge control. And his recovery time is so small too @.@ he hits like a heavy with the speed of a light offset by no air game and ledge recovery. And that's ok, because you should rarely get launched due to super armor.
Spoiler (BADUM TISH) alert, this is about a non-default character that wasn't revealed in a trailer