and since we know the movies' version of the characters are far above their canon counterparts from the manga, such as when cell saga saiyans were fighting broly of whom is confirmed by his director to be a multi galaxy buster.
broly director: Il peut détruire des galaxies (he can destroy Galaxies).
source of the interview:
SS3 Goku in fusion reborn was shaking the cosmos for example by just transforming like in earth.
M11 goku fought broly and put him down in hell as stated here.
This means that M12 goku who has SS3 scale off considerably higher per SS3 multipliers as well as scaling above LSS broly. as a Restrained SS broly alone destroyed a galaxy.
that makes goku a multi galaxy+ buster.
it should be noted that the feat is at least universal and more in range because of multiple realms being affected. that doesn't necessarily mean of course that goku is able to destroy them, just that his power range is that wide. tho if goku choose to do so, it would be as an SS3-jin for him than it was for a restrained SS broly.
profile entries about heaven, and the other realms/afterlife from the daizenshuu:
most likely, hell would be the same size being the opposite side of heaven.
there is also Emma realm, but we don't know exactly how big it is tho we do know it exists inbetween hell and heaven.
it's good to note that those realms are sealed off from each other.
such feat affecting the afterlife, being multiple realms sealed from the physical universe that are comparable to the latter is what makes it universal and more in range.
and last but not least, we know the GT verse kid Boo would have stalemated this version of SS3 Goku. we don't know exactly know which boo goku was talking about so let's play it safe and say it's mr boo.
it would mean that goku was fighting somoene with either 30%/40% [as evil boo took most of fat boo powers] the power of fat boo. fat boo that was around SS3 goku's level.
This would mean that this GT kid goku is actually around SS2 and SS3 goku, and stronger via kaioken. as he even got the upperhand at rildo, the guy whom goku was comparing boo to.
This means that GT goku going SS3 would be around 200x and considerably more [if we lowball and equate rildo to mr boo, even though rildo is statedly stronger and so was goku] greater in power than M12. thus massively multi universal.
let alone SS4 [which is stated to be a transformation whose power up is around/equal to potara fusion].
source of clarifcation from kazenshuu about how the scan refers to actually how SS4 goku compares to a hypothetical GT vegito, not Buu saga one:
Do you guys think GT verse is lowballed a lot because people are unaware of this?
removed due to comicvine bug spamming their notifications box.