At the bottom of each Forum page is this text
© 2002-2013 SQUARE ENIX CO., LTD. All Rights Reserved. FINAL FANTASY, SQUARE ENIX, and the SQUARE ENIX logo are registered trademarks of Square Enix Holdings Co., Ltd. Vana’diel , Tetra Master, PLAYONLINE, the PLAYONLINE logo, Rise of the Zilart, Chains of Promathia, Treasures of Aht Urhgan, and Wings of the Goddess are registered trademarks of Square Enix Co., Ltd. The Online icon is a trademark of Sony Computer Entertainment America Inc. "PlayStation" and the "PS" Family logo are registered trademarks of Sony Computer Entertainment Inc. Microsoft, Xbox, Xbox 360, Xbox LIVE, and the Xbox logos are trademarks of the Microsoft group of companies and are used under license from Microsoft. The rating icon is a registered trademark of the Entertainment Software Association. All other trademarks are the property of their respective owners. Online play requires internet connection.
I would recommend updating it to say (changes bolded, removal struck through and in red, additions in green):
© 2002-2013 SQUARE ENIX CO., LTD. All Rights Reserved. FINAL FANTASY, SQUARE ENIX, and the SQUARE ENIX logo are registered trademarks of Square Enix Holdings Co., Ltd. Vana’diel , Tetra Master, PLAYONLINE, the PLAYONLINE logo, Rise of the Zilart, Chains of Promathia, Treasures of Aht Urhgan, and Wings of the Goddess, and Seekers of Adoulin are registered trademarks of Square Enix Co., Ltd. The Online icon is a trademark of Sony Computer Entertainment America Inc. "PlayStation" and the "PS" Family logo are registered trademarks of Sony Computer Entertainment Inc. Microsoft, Xbox, Xbox 360, Xbox LIVE, and the Xbox logos are trademarks of the Microsoft group of companies and are used under license from Microsoft. The rating icon is a registered trademark of the Entertainment Software Association. All other trademarks are the property of their respective owners. Online play requires internet connection.
as soon as the Seekers of Adoulin trademark is registered, if it is not already registered.

You may also wish to include the add-on titles in this text.