I know they already renamed it ''Berserker'', and it doesn't make sense for Vegeta to freak out about it but I still hope they find a way to call Broly the Saiyan of legend(without making it seemed forced).
The idea of Goku, Vegeta and the others just stumbling into the SS forms but the actual once in a thousand years mythical Super Saiyan being an unknown guy who has nothing to do with the main plots is so cool to me and I don't know why. Maybe because it's makes DB's world feel bigger or how it'd be so typical of DB to turn the trope of the ''Chosen One'' on it's head like that.