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with the newest teaser trailer in japanese we had shenron basicly summoned with a request that "there is some i want you to revive" and that it would be a The worst wish in history. Now despair beings.
And despair actually means in the dictionary the loss of hope, having no hope, because the situation is so bad that there is simply a no way out. thats pretty seriously
Which is ofcoooourse is going to be speculated that they are saiyans or other crap, but i highly doubt that, because, first saiyans died 40 years ago, their also a pretty violent race i would say they have planet busting capabilities! although even then they would get easily destroyed by any z fighter easily these days because of the power level.
if goku wanted to revive saiyans he would have already did lol.
i think what is going to happen is their going to revive a completely new character, i am doubting a bit that it might be original super saiyan god! but then why would he be worst wish to ask for? since wouldnt he be a good guy?
MY ANSWER
I think the wish goku made has nothing to do with that text LOL, i think it was just created as some hype train, i think what actually happened in the movie shots powering up actually happened way before shenron was summoned, i think it was during some fight with some other character, and THEN thats when in the end i think their going to call shenron out, maybe somebody or someone died and they want to revive him back, but i dont think the story is going to begin with goku powering up and summoning shenron thats just doesnt make sense.
but are we going to see a new god or a goku become omnipotent or some other shit, there is a chance