Freeza's story is only going ONE of two ways. (IMO)
1. He's gonna become a redeemed good guy.
2. He is going to become more powerful then Zeno, and be the final antagonist for the series.
I can't see Freeza ever becoming redeemable, he does not care about anyone or anything, except MAYBE for his own father, he is a sociopath.
So that leaves us with number 2, and there's 1 big reason WHY I can see Freeza reaching this level of unfathomable level of power:
I 100% believe this is foreshadowing.
I believe it'll be something along the lines of the Zenos dying, the Angels getting defeated, as well as the Grand Priest, all the Gods of Destruction banding together and trying to defeat him, Beerus putting up a more decent fight then the others but getting smacked around being all like "You dare mock me, the great lord Freeza? Look at you now, the great God of Destruction Beerus under my heel!"
Then Goku goes to fight him with some secret power, idk.