Let's Get Serious - We need more Reverse Skins

Swain: a big bird dressed as a human that sends litle humans towards his enemies

Gragas: a HUGE barrel that throws a semi naked human

Kog'maw: A big blob of spit whose attack animation is small kog'maws

Reverse Gnar

Reverse Sejuani would look a tad weird....

Honestly you have reverse annie because annie looks cute on a bear onesie. You cant say teh same about the other you are suggesting