After watching DB Super Broly in English no cam, no whispers....Its evident that Frieza is hiding another form on the low; firstly vegeta was worried about just that while initially training with Goku......Frieza was basking in the beating Broly gave him, admiring his strength, when he turned Golden Frieza he pushed a shocked Broly back; and appeared he was smirking appearing hes about to stop bullshyting around taking blows from a SS Broly (who made Goku and Vegeta run), until Gogeta interrupted the sparring session; .......Then in the end of the movie Frieza talks of beating Broly alone unworried about his power, not to kill him but needing him in a Goku/Vegeta duel as he understands his new form and how much he improved isn't stronger than a fused Goku/Vegeta; but unfused I think he knows he takes Goku and Vegeta and maneuvered around as such the whole damn movie