The Legendary Super Saiyan was thought to have been Brolly. This is not true. Brolly was born a Super Saiyan, but never really turned it. But, He was the first SSJ ever. The legend says that a super saiyan will emerge every mellenia. This is true. But Brolly is not the Legendary Super Saiyan. The Legendary Super Saiyan is really someone that Turned SSJ a mellenium before Brolly turned SSJ.