Hey great news, I jus got an email from Automat Pictures http://www.automatpictures.com, the company behind the US special editions of the "Rambo" trilogy and "Basic Instinct", asking about some informations for their new DVD edition of UNIVERSAL SOLDIER !! And from what they asked me this edition seems to go much deeper than the UK special edition!
I don't know the release date yet but I guess it's due in the upcoming 6 months...