I found it kind of interesting that the teaser of Broly had a sort of SS4 quality about him. Then when his character sheet was revealed, and the new trailer, he has a powered up base form that has hair reminiscent of SS4. Which got me thinking, Berserk Broly and SS4 have a lot in common in that they were both an attempt at a sort of unofficial explanation of the Super Saiyan of legend. Broly, of course, was literally described as the Saiyan of legend in his debut movie and in GT, in order to attain SS4, you had to become golden oozaru, which is obviously a nod to the golden ape in Vegeta's telling of the legend in the anime. I have also heard in the past SS4 described as the true super saiyan form( I don't remember where), but then in super during the ToP, Vegeta describes Kale's berserk form as maybe being a Saiyan's true form which reminded me of SS4.
Anyway just thought that was interesting and maybe Broly in the new movie could lead to the canonization of SS4