That is what happened to me recently. Ever since I received the Marvel digital subscription as a gift, I've been using it to finally read the huge story arcs that passed me by for one reason or another. The stack of digital issues I'm currently working through contains the Planet Hulk/World War Hulk stories and their respective tie-ins to other series. What proved to be my thought muse were the initial events that set up the entire arc.
Spoilers to follow, maybe.
At the start of the Planet hulk story arc, one of Earth's greatest assets and also dangers has once again caused a mass loss of lives. While on a S.H.I.E.L.D. mission, the Hulk (in this iteration of the Hulk, Bruce's intelligence is retained after transforming) is driven mad when a gamma bomb literally blows up in his face. He winds up killing many innocent people as he rampages through Las Vegas with only the Thing slightly slowing his progress. Eventually, Banner does regain control of the Hulk but the damage is done.
After some deliberation, it is decided behind Bruce's back that the Hulk is too much of a danger to the entire world to remain on it. Even though the Hulk was a huge asset, the list of “major accidents” was continuing to grow. Through careful planning, he is eventually shot off into space and unintentionally travels through a portal to another planet. Eventually, after a lot of kick-ass panels, he makes his way back to earth. I'll give you one guess as to what his emotional state is.
There has always been a serious societal tone when talking about these subjects (especially after 2011), but it seems that the, “is the risk worth the reward?” mindset only stuck with those local to the disaster. While Japan has continued its push toward renewable energies, albeit an expensive transition (billions in US$ spent to import fossil fuels in the mean time), most other countries continued to include nuclear energy as part of their long term energy strategies.
Just like we are always searching for a better equivalent substitute of energy production, what would a equivalent substitute for the Hulk be? To filter things down a bit more, lets try to go for heroes that are from Earth or at least call it their permanent residence. Whether it be one superhero or a group (as few as possible), let me know what you think!