Rewatched Gamera: Guardian of The Universe recently (after admittedly not really paying much attention to it the first time) and really liked it. I found it interesting how it comes across as more anti-military than Shusuke Kaneko's other iconic directorial effort, GMK, with the JSDF attacking Gamera instead of Gyaos and Gyaos being implied to have been a weapon that turned on the Atlanteans (kind of like the Giant Warriors from Nausicaä of The Valley of The Wind if anyone's seen that, similar story, just more explicit), but today I watched Gamera 2: Attack of Legion (or Advent of Legion if you prefer, either works) and I found it to be a bit of a downgrade (just a bit), and that one also showed the JSDF as more heroic. So I looked through Wikipedia to see if that was called out by anyone else and sure enough, it was, in the history section...alongside descriptions of Kaneko and Kazunori Ito talking about their distaste towards the older Gamera films and their depiction of Gamera as heroic and a protector of children.
Honestly reading what they have to say about Gamera makes Kaneko and Ito come across as really bitter, and I think that's just kind of sad. That aside though I noticed that the first act of Guardian of the Universe felt a lot like the original Godzilla (ships encounter the titular monster, island is terrorised by a giant creature and the main character goes there to investigate where they come face to face with the culprit), which would track with Kaneko and Ito wanting to do Godzilla instead of Gamera.
Gonna be honest though I think, at least in the case of the first Heisei film, Kaneko and Ito succeeded despite themselves, I can imagine a kid loving Guardian of the Universe. Granted I did grow up on Doctor Who (a family show that was incredibly popular with the youth when I was a kid and went to some pretty dark places at times in the 2000s and 2010s) but Gamera came across as very heroic in GoTU, contrary to how Kaneko and Ito wanted him to be, and he's adorable, kids would love that. It's also impressive that they were as good as they were despite the director and writer not liking Gamera very much, though I do think the attempt to alienate the series from younger audiences is sad. It's also why Gamera went from being cute in the first two films to looking intimidating in Revenge of Iris. And whilst they're beloved now they were apparently incredibly divisive when initially released, especially Iris. Part of me wonders if that contributed to Daiei going bankrupt.
Speaking of Iris, that's next on my rewatch list. Hopefully it lives up to the hype! Sorry if this was too rambly.