As reported on Andrisang, some new Final Fantasy XIII-2 DLC is due out later this month. You can download a new opponent from the Coliseum.
The opponent will be Final Fantasy XIII villain Jill Nabaat. She will be made available in Japan on March 13th. We can expect to see her released in other territories shortly after this.
Square Enix will officially announce more details for the Jill Nabaat DLC very soon. Hopefully some screenshots are released too.