The official website for the anime series Koihime†Musou has announced that the series will indeed get a new OVA project. No news yet on what the content will be, however it will be quite different from the original series.

Koihime†Musou the anime was adapted from the adult game of the same title.

Also, Tales of Symphonia will be getting an OVA sequel. The sequel will be called Tales of Symphonia: Tethe'alla Chapter. The news was announced by Bandai-Namco at the Tokyo at Tales of Festival 2008.


For more information: ANN & ANN

Update
Official website of "OVA Tales of Symphonia The Animation Tethe'alla Hen" opened.
http://www.ova-tos.com/
It will be released in the Spring 2010.