We had a super hero party this year. Each child got a super hero mask and cap. I bought mine from Amazon but there are a lot of DIY ones I found on the internet. All the kids loved that they got a costume to take home. That was all I did......no candy or anything. If I had it to do all over again, I would possible do a photo booth with props. Those are just fun! Here is a link for ideas for the party....
Here is a lot of ideas from Hostess with the mostess blog...
http://www.hwtm.com/index.cfm?page=c...0&searchtype=1
A video tutorial to make your own cape....
http://www.howcast.com/videos/125532...Superhero-Cape
Here is what I got for my son's party....
http://www.amazon.com/gp/product/B00...ms_ohs_product
and
http://www.amazon.com/Little-Adventu...7659746&sr=1-1
I hope this helps!