Hmm...

The left side,a mugshot of a major character. The right side,a snappy slogan that relates to the character,on a packground in that character's theme/team colour,with the Last Res0rt emblem on prominent display in the center,in a contrasting colour.

That,or...

A picture of Jigsaw and Daisy holding weapons with whatever background you want,with the caption "It's got girls with guns! What more could you ask for?"

Just my two cents.