Let's start a bet gentlemen! (don't worry there will be no real money involved we'll use fake imaginary currency beans) the options are: (also you can add your own option if you want)
melony dies
turns out smg1 was right all along and then the box leader dies
turns out box leader was right all along and smg3 uses the power to be a bad guy again
somebody comes back(?)
the scu (smg4 cinematic universe) fuses (because in the end they show the real world before melony, smg0 and box leader leave
feel free to add any others!