Square-Enix has released a bunch of new screens for Final Fantasy XIII-2, with a few info snippets.
Characters
"Caius was once Noel's friend, his mentor. Why is he trying to stop them?"
Crystarium
"This shows the growth route of your characters. When you win battles and complete missions you receive crystogen points, which are used in the Crystarium to develop your characters, boost parameters, and grant powerful new abilities."
Monster Adornments
"Decorative additions for your monsters can be found in locations throughout history. Use them to give your monster allies an extra bit of colour and jazz--they won't affect battle performance at all, so feel free to try any combination you like."