Big Payoff?

Anyone know what the big payoff mentioned here is for completing 100% for all difficulty modes and when we can expect it?

https://forums.playcontestofchampions.com/en/discussion/84967/announcing-gwenpool-goes-to-the-movies/p1

Comments

There is no extra "big payoff" it was just the special cinematic crystals at the end

It was the easy 5*, 4*, legendary and ultimate crystals.

ok thanks. based on the wording i thought maybe we were going to get something else.