Brooke, her husband, Jasmine and PB were X-Men:
Storm, Cyclops, Rogue and Professor Xavier
Brooke made that little suit! Cute huh?
Jaime and her husband were characters from Harry Potter: Professor Trelawny and Snape.
On Jordan's personal blog, she also has an AWESOME list of family costume ideas. Plus more great costume ideas if you are expecting. Look, they're Phineas and Ferb!
Hope you've gotten a little inspiration!
What are you going to be?