Possible banner

I'm working on my banner for Emerald City Comicon and Vancouver FanExpo.  I'd like to do something with imagery on it, but I don't want to feel like it is obsolete soon after it's done, so I'm hesitant to put paintings on it.

Final banner will be 36"x78" and pull up from the floor.

This is the first idea that I had, I'd love some feedback.

Here's a 2nd, for contrast.