Dodgeball Draven. Think about it.
Q - starts dribbling a dodgeball. He can dribble both. If he drops it, it bounces away from the drop point.
W...I mean there isn't really much to be done with W particle effects wise...it's a pretty boring skill.
E - flings a ball hard enough to knock people over.
R - throws dodgeballs so hard they catch fire. Give them a little backspin, so it makes sense when they turn around and come flying back in his direction.
Make his autos make the same *bink* noise we all remember from middle school. Dress him up in sports shorts and a sports tee.