There's to be a Lightning Volume, a Snow Volume, a Sazh Volume and likely more. It's unclear though if they could arrive as DLC, or if Square Enix will choose other outlets.
This information came by way of an interview with the two senior devs printed in the Final Fantasy XIII-2 Ultimania guide books, which weigh 1.621 kilograms together.
Final Fantasy XIII-2 releases on Xbox 360 and PS3 tomorrow in Europe, February 3rd. One of the game endings is said to tease a 'To be continued...' message. Will Square be releasing epilogue content to explore?