A Valley entrepreneur has gone public in the Daily News with his desire to build a 9,000-seat sports and music arena in North Hollywood. The Oasis would be at the terminus of the Red Line subway and go after minor league sports and shows like the circus. If it happens, it wouldn't be a first for North Hollywood. The Valley Garden Arena on Vineland Avenue used to hold boxing matches and was the home of the Los Angeles Braves. Never heard of the Braves? They were an untelevised knock-off of Roller Derby in the 1960s.