"... Moreover, don't forget that each character from Soleil graphic novels is available in the pack only during 6 months! The characters from Kookaburra won't be available as of March 2007, followed by those from the Arcanes in April, and so on... Don't wait too long to get them! "
This is an official announcement from the Urban Rivals newsletter. Hurry!
For more info, check the latest post by Mac Leod in the Staff announcements.