A call for help

So here's a seek peak at my newest story, "Pluck" but I need help with the drawing. I need something to fill the empty space. I'd like you to comment your idea. I'd be a big help!

Option 1: the main character's Father (and or his brother)
Option 2: the main antagonist (ideas welcome)
Option 3: his younger self
Option 4: another possible mentor (list your idea)
Option 5: love interest
Option 6: best friend (ideas welcome, keep in mind this is a young justice story)
Option 7: him in his mask.

Any help is appreciated!