Quote:establishing Hulk is stronger than Thor...
The book doesn't really do that. Thor is forced to fight because of an obedience disk, which he is actively struggling against. Thor is asking Cho to unleash his full might and kill him to prevent him from killing Cho. At one point, Thor has a moment to deliver the (possibly) killing blow, but is able to keep from doing so long enough for Cho to clock Thor, who is only stunned, not unconscious. After which, Cho destroys Thor's obedience disk. Basically, the fight has numerous qualifications.
I think they successfully maintained the ambiguity of any Hulk/Thor fight, using two characters that are not supposed to be their "top" versions by design and having both trying to hold back and no one really koing the other, not unlike they kind of did in the movie Ragnarok (even though technically, the script does point to a more likely winning thor before the Grandmaster zapped him, but alas, it's not really the point).
I mean, I expected it, but since it was used as a "power level meter" it became an ever-expanding moniker. It followed the same fate of "Omega threat"... First, there were hushed talks, then Surfer was called Sakarson, and he brought up the world breaker, so he left because he associated it with Galactus (and so we did it as well). Then it was Hulk at his top in both rage and loss of control, and it did look amazing and appropriate after his fight with a pretty blandly characterized Sentry, and some even forgot that destroying planets is something an Above at his top should be able to do if pushed to it (and often did in the past). Then, it was Hulk's son, then it was Galactus again, then it was Hulk's other son. Then it was an even more impressive Hulk unleashing in the perfect condition, which fixed the name as a "hulk thing" for a little while. Then there was the Asgardian spirit created by the Serpent, Nul. Doom was one during Hickman's run (Breaker or Destroyer of worlds, i think, but i can give him a pass since Doom is usually very theatrical), then Starbrand (and Hyperion, Hulk, and Thor by narrative implication later on) was also called so during Infinity if i recall correctly; then Thanos used it recently, now Odinson is called it when he "almost breaks Sakaar" with an axe hit, and Cho is likely to be the next "world breaker". If the Soviet Missile isn't going to beat him to it apparently.
I mean, I know how it goes, in comics usually when one title is given, in time it has to be passed around; it works with capes, and with series titles as well. It happened with the Omega/Alpha plus level classification for Mutants/Cosmic based heroes. It's all part of the ever-sliding power scaling that has to be applied for each new threat to feel bigger than the hero, and for the hero to appear to have "grown" while always bringing him back to the starting line. To be fair though, most of those on this list are at least supposed to be able to destroy a planet under their own powers, at the very least.