oh my goodness I started on page 1 and made it to 11 before I had to finally make a profile and post. Look guys, I know nothing of Superman Prime. And there is a lot of talk of canon and non-canon. But recall that when Superman had a crossover with "Aliens", as in, Ripley, Predators, etc., he had trouble beating one after a few days away from the sun. What would you rank an Alien in the DB universe? A level 10 to 50 maybe? So let's say superman did a bunch of stuff like sit in the sun for 15k years. What is the rate of power increase per minute in the sun? Does anyone know? So, a bunch of unanswered questions I'm starting with, so I'll just progress with my argument which centers on this fact: Vegeta in the first saga of DBZ maxed out at 18,000, power level. At a point far weaker than this, he EASILY destroyed a planet - maybe 10,000 power level, we'll say. By the end of DBZ Frieza saga, Goku was well beyond Frieza. What was Frieza's power level? He claimed 1 million at his SECOND transformation level, but then after two more transformations revealed that he was 1% of his power level. ok, so let's just say that he merely doubled his strength each subsequent transformation (more like 5x more it seemed). That would still put him at 400,000,000. Goku, at SSJ1, was at least 5 times more powerful than this. Am I wrong? This puts SSJ Goku at 2 billion power level. Now this is going to invoke disagreement, but I'm just assuming Frieza was telling the truth about his power - the show never gave us reason to doubt his statement. So that means Goku could destroy 200,000 planets without effort - one blast from his hand - at his weakest Super Saiyan level (2bilion divided by Vegeta's 10k). Now by the time they're facing Buu, the anime's version of God - the Supreme Kai, ruler over all Kai's - the one and supreme God - was a weak, useless character that could not even begin to attempt to face Buu. This Buu could scream so powerfully that he could rip wormholes in spacetime from sheer vibrationally force of his vocal cords. No magic required. No ultimate universal wussy tricks. This Buu had the powers to warp reality, as people brag about Superman Prime - he ate Goku. Goku was fighting Buu's mystical weird, surface warping insides where he was constantly faced with compressive muscles and acid and Buu himself. Goku was just like, gee whiz, this is weird, haha. He almost literally had fun in the process. Goku constantly faced competitors that could seemingly warp themselves into other shapes and 'augment reality' around him and he always found some way to survive. Why? Because even if Goku died, he could wish himself back with the dragonballs - the whole universe was on his side - all the kamis that governed the doors to death loved and respected Goku - they would let him use the dragon balls after death, assuming you won't let others bring Goku back. But my point is Goku doesn't need to wish for immortality in some out of character gesture - he just needs to wish himself back and as a saiyan, will be how many fold stronger upon return? At least a few. So let's take Goku at the end of the Buu saga - he must be at least 100 times stronger than at the end of Frieza saga (skipping the Cell saga all together!). 1000 times? 1 million times? I don't even know. In any case, we're up to 1 trillion. Now he can destroy 100,000,000 planets with no effort. When I say no effort - no powering up. Baseline. Moving along to GT - oh please, yes he gets spanked in his SSJ 4 form by android 17 and the final dragon is tough. But like some previous commenter mentioned, they were arbitrary, god like characters meant to be the penultimates like the Doomsday was to the original Superman. He needed to show he still relied on skills. BUT: what if Goku used his dragonballs to wish Vegeta to his side to form SSJ4 Gojeta or whatever it is called - frankly - he would do that and it is within the scope of the forum thread. SO - that would pretty much increase his powers exponentially from whatever SSJ4 was which had to be in the quadrillions or MORE. At this point, without effort, he could destroy galaxies and with his mind, just power ramping. Literally - he would just need to charge up and the galaxy is blown away before he throws an attack.
Why this never happened is indicated in Z when they perform in a tournament before Cell came along. Hercule (the world's strongest normal human) punches a strength bag and gets 180 or something as the reading. Even the weakest of the DBZ fighters, barely tapping the bag with a finger, get in the several hundreds. Vegeta just punches it out of the stadium. But the lowest reading was given by Goku, the strongest of them. He can control his energy.
Let's not underestimate Instant Transmission. I don't recall the specifics, but I'm pretty sure it was way faster than light. It was instant. So that means nothing can move faster than Goku. Yes, they were all moving almost light speeds by the end of Z. But Goku was moving much faster before fighting Cell. Importantly(!) Goku indicated signs of omnipotence while using Instant Transmission. He could sense energy levels, locations and even finer details of individuals and objects at other ends of the galaxy and then transport there instantly.
In the end my benchmark I'm using is Vegeta at 10K. They were destroyers of worlds at that power level. Half way through the series, "God's" plan was having Goku save the Universe. By the end, "God" was already killed (or fused) to attempt battle with one of enemies Goku laughed while fighting (he enjoys fights). But if you still find this Superman Prime so immovable, why couldn't Goku just wish for the all the Sun's to be turned into moons (temporarily). Goku gains extra power from moonlight while in SSJ4 form. Or he could wish the Sun's light away temporarily.
I understand Superman Prime is invulnerable, but really guys, so is Goku - and Superman's reality warp is just plain not going to work on Goku in any effective way - it's been tried in similar methods in the DB series. It's just the scale of energy he can create by the end of GT is so ludicrous that it's beyond the energy of black holes. Well, well beyond them. Like, Goku could walk into a black hole and start giggling because it tickled. It was almost asinine because they had to do weird things like resurrect Buu in order for him to have challenges. I more than welcome a true story of why SMP would win though. But make it more interesting than "superman in a sun for 15,000 years". We need numbers - what is the rate of strength increase per minute?