overFantasies
This gives has gone down hill fast for me. There was no reason to travel to an entirely different verse when dc is big enough and much of it is unexplored by other fics. Rather than going to a weaker verse he could have been transported to somewhere in the DC verse, which would have given him more powers and technology than the invincible verse.
Investigate how to make a time sphere... chamber I could use them to build prisons. For example: someone is sentenced to 10 years, seen from the outside they enter prison and leave minutes later... but for the inmate it will be years... kukuku Continue investigating time, so that when you travel to other universes you arrive at the time you want. Or, the "time lag" so that when you leave a universe to which you are interested in returning, only minutes pass when and when you return.
why not let him enter The Future Timeline of Trunks and actually save Gohan of that Timeline! bring him to Flaxan Dimension enhance his already Hybrid biology say with Viltrum DNA! and unleash his potential unlocking in Flaxan Dimension! or even take Bulma to help her finish building The Time Machine Much faster!
He can imitate doc Connors from Spiderman and make a limb growth formula that doesn't make people go all lizard. Since he is already making something for normal people. A training montage for the teen team would be funny. The guys in the group would definitely have some panic angst because of random girl drama. Up to u