Sony's efforts to win the next-gen DVD format tussle, spear-headed by the equipped PlayStation 3, have been dealt a blow this week with studios Paramount and Dreamworks opting to support the rival HD-DVD format with their latest releases.

Blu-ray will be spurned by the studios on a worldwide basis, both firms explaining their belief that HD-DVD is the best option for consumers. Blades of Glory will be followed by and Shrek the Third, according to the latest news.

"We decided to release 'Shrek the Third' and other DreamWorks Animation titles exclusively on HD-DVD because we believe it is the best format to bring high quality home entertainment to a key segment of our audience - families," explained big cheese Jeffrey Katzenberg.

"I believe HD-DVD is not only the affordable high quality choice for consumers, but also the smart choice for Paramount," added exec Brad Grey.

Paramount have, in the past, released on Blu-ray, while Dreamworks have supported neither format in the past. More wars as we get it.

By Luke Guttridge