Future Gohan went to the past?

[GSM123]

Bulma tells Gohan she's working on a time machine and Gohan goes on Trunks' place to the past. How would things play out?

 

[SSJ2]

How many arms?

 

[withheldforprivacy]

https://www.fanfiction.net/s/8525749/1/Dragon-Ball-Z-History-of-Gohan

 

[Jeff Styles]

Goku and the others would believe he was telling the truth about the Androids at first. Gohan would take Trunks's place in the ROSAT, power up, haircut, and would probably success in stopping Cell from achieving his perfect form.

 

[Captain Cadaver]

Since Trunks' existence wouldn't be at stake, he'd have no problem revealing his identity. Assuming Trunks can survive whilst he's gone, they'd probably come back together during the next trip, though Trunks would enter with Vegeta still in an attempt to know his dad better, meaning the plot progresses as it did in the original timeline. The only difference is that Gohan would likely gain MSSJ from his Rosat trip(s) due to having a mindset closer to his father's. I don't see why he wouldn't bring Trunks along as support, seeing as how the Time Machine is big enough for both of them.

As for Super, Gohan being there to train with Trunks would allow them to stop Shin from dying, meaning Zamasu wouldn't come to this Universe and is instead stopped once the Daishinkan or Zen-Oh become aware of him. Even if somehow Shin wasn't saved, the arc wouldn't change much from it's original self. Black only kept Trunks alive so he could get more Zenkais, so he'd probably kill one of the two half-Saiyans due to not being essential. Biggest difference would be that Trunks dies and Gohan fulfills the exact role he did, maybe hooking up with Mai as well.

 

[GSM123]

How many arms?

Three and a half

 

[withheldforprivacy]

How many arms?

Three and a half

The third is the one between his legs.

 

[GSM123]

The third is the one between his legs.

I thought this was the half one.