Agreed, it's been so long since we've had a Gamera movie. The 2015 "trailer" was nice but I need more. I could go for either a Heisei like movie or a more Friend to All Children approach - I know you don't like it, but I thought Gamera The Brave was good. So either way is good for me if we get a good film. And I'm good with either new or returning monsters, but NO GYAOS! They're good, but overdone. They appeared in two of the Heisei films, the intro scene for The Brave, and the 2015 trailer. Personal opinion? Guiron with modern effects would be a silly yet wonderfully awesome sight!
Depends on what you mean by hokey. If you mean obvious suit material, sure. If you mean it needs to look like it walked out of Pacific Rim of MonsterVerse, I'd still rather it be hokey then. We kind of have had a lot of "realism" lately in this space so something that goes in the opposite direction would be fun now I think.
It's more how stiff he is. But that might just be the old suit. A modern redesign could keep those elements you listed while removing the drawbacks.
Tbh, Gigan looks dangerous, and he does cause Godzilla to bleed, but has he ever proven to be a major threat? Godzilla trounces him in every match up.
Yeah, visibly he's insane. He's a cybernetic chicken dinosaur with a 1000 blades. You can't beat that! So he should and sometimes does harm Godzilla a lot. But IMO, it never feels like a battle of equals, unlike when Godzilla fights Mothra or Rodan in some version. I think it would've helped if Godzilla vs Gigan was just those 2 monsters. Godzilla would still win, but Gigan would have more of a chance to show off his abilities and actually pose a threat to Godzilla. I'd like to see something like for Gigan in the future.
Rodan hasn't been an equal since like the 90's Heisei era. He only showed up once in the Millennium era during Final Wars and was not on Godzilla's level. Legendary's got beat by Ghidorah and became his beta, nearly got killed by Mothra, then bowed to Godzilla cowardly at the end. Singular Point's was one shotted by that Godzilla. And there's a new ride in Japan where he gets one shotted by Ghidorah.