<BODY><P>Big B versus Big B </P> <P>Two Bachchan Sr. starrers are expected to clash on December 8: <EM>Eklavya – The Royal Guard</EM> and <EM>Baabul</EM>. Initially, the producer of <EM>Eklavya</EM>, Vidhu Vinod Chopra, had zeroed in on the date, but R