Goods Ideas That Warranted More Development

It's probably fair to say that a lot of ideas - good or bad - go nowhere or aren't totally developed throughout the Godzilla series. Sometimes, they just doesn't need to be explained any further in a particular movie's context; other times, they're so underdeveloped and prematurely ended that it's painful to watch them go to waste (SpaceGodzilla and Megaguirus being major offenders). So, without further ado, why don't we point out and discuss some ideas presented in these movies that could have, would have, should have, warranted more screen time? I can think of a few, anyway:
+ Godzilla's pre-1954 history. GvsKG delved into it somewhat, but there are other threads presented in Gojira that interest me and, to be fair, didn't really need to be elaborated on for the original movie's purposes. But Odo Island and its traditions are never really revisited in the series. We're told that the exorcism ceremony is the last remnant of an old religious tradition, and that the islanders used to sacrifice women to Godzilla. Just how prominent was Godzilla's role in their belief system? If he was only awakened by H-bomb tests, was something else harassing them before he showed up? When and why did they stop making human sacrifices? The old man looks to be about seventy or eighty years old - which makes me wonder if he was alive when these sacrifices were taking place (it seems like he was, but I'm not certain).
+ A second Oxygen Destroyer. Its presence (with all associated implications) in Destoroyah isn't resolved so much as forgotten about, which is pretty lame for a movie that tries so hard to tie itself back to Gojira. Even at our current level of military technology, the Oxygen Destroyer is a terrifying weapon, and it's unsurprising that someone would try to recreate it or come up with something very similar. At the same time, how likely is it that the OD's creators would keep offing themselves and destroying their notes to keep it out of political hands? If some government ordered another one built, having been impressed by its performance in 1954, who or what could stop them? And let's suppose that the OD would've worked the way it was said to in Destoroyah, and was capable of turning Tokyo into a "mass grave." OD proliferation would be a nightmare akin to the nuclear arms race. If every powerful nation had OD's to kill kaiju, surely a treaty would be needed to curb proliferation or, at least, keep warring states from killing each other (and possibly everything else on the planet) with Oxygen Destroyers. What would the world be like if any new threat (especially a monster) could be easily killed with an Oxygen Destroyer? Possibly, it wouldn't be much different from the consistent rejection of nuclear weapons in the series.
+ Seatopia's connection to Space Hunter Nebula M. I just think it'd be fun to explore their history together, and at this point I'm too tired to elaborate on all the possibilities anyway.
That's all I've got for now.
+ Godzilla's pre-1954 history. GvsKG delved into it somewhat, but there are other threads presented in Gojira that interest me and, to be fair, didn't really need to be elaborated on for the original movie's purposes. But Odo Island and its traditions are never really revisited in the series. We're told that the exorcism ceremony is the last remnant of an old religious tradition, and that the islanders used to sacrifice women to Godzilla. Just how prominent was Godzilla's role in their belief system? If he was only awakened by H-bomb tests, was something else harassing them before he showed up? When and why did they stop making human sacrifices? The old man looks to be about seventy or eighty years old - which makes me wonder if he was alive when these sacrifices were taking place (it seems like he was, but I'm not certain).
+ A second Oxygen Destroyer. Its presence (with all associated implications) in Destoroyah isn't resolved so much as forgotten about, which is pretty lame for a movie that tries so hard to tie itself back to Gojira. Even at our current level of military technology, the Oxygen Destroyer is a terrifying weapon, and it's unsurprising that someone would try to recreate it or come up with something very similar. At the same time, how likely is it that the OD's creators would keep offing themselves and destroying their notes to keep it out of political hands? If some government ordered another one built, having been impressed by its performance in 1954, who or what could stop them? And let's suppose that the OD would've worked the way it was said to in Destoroyah, and was capable of turning Tokyo into a "mass grave." OD proliferation would be a nightmare akin to the nuclear arms race. If every powerful nation had OD's to kill kaiju, surely a treaty would be needed to curb proliferation or, at least, keep warring states from killing each other (and possibly everything else on the planet) with Oxygen Destroyers. What would the world be like if any new threat (especially a monster) could be easily killed with an Oxygen Destroyer? Possibly, it wouldn't be much different from the consistent rejection of nuclear weapons in the series.
+ Seatopia's connection to Space Hunter Nebula M. I just think it'd be fun to explore their history together, and at this point I'm too tired to elaborate on all the possibilities anyway.
That's all I've got for now.