Of course they should be, otherwise you don't have any distinguishable characters at all. It's experience that shapes a character and that means you have to encompass unique circumstances otherwise you don't get unique characters.
Experience, not origin of powers. Cyclops has a very very different origin and character building experience then wolverine and even more so that of Apocalypse. Where it counts anyways but all are 'mutants'
As vague as this rumor is, does it remove the idea that wondy grew up on an all female secluded island? That she worships gods? I don't think the birthing needs to be as it is in the comics for it to 'work' and honor material. TDK trilogy knows all about that.
If you leave this unique trait of what makes Wonder Woman out you essentially reduce her to "generic Superheroin lady" or to say it differently. Her spot could be easily filled with any superpowered female character.
Curious, is that how you define every single other super heroine that isn't wonderwoman? "generic super lady" all with interchangeable spots?
Except that WW is not only about "representing" deities. She interacts with them on a daily basis. Her arch enemy is a deity she physically fights. Her second greatest enemy is a minor godess and sorceress who can turn people into animals. Her FATHER is the friggin King of the Gods. One side of her family are Gods, meaning brothers, sisters, aunts uncles and so on and so forth....
...And it does reduce Wonder Woman. It reduces her to nothing more than an acessoire of a MOS sequel to something that has no potential to stand on its own and thus makes her inferior to Superman or Batman. She really deserves better than to be Supermans new shiny handbag.
If that's what you really see such a thing amounting to than you are entitled to your opinion though it seemingly falls into hyperbole imo.
Secondly, it could be said that batman interacts with metahumans and superheroes on a weekly basis, yet most of his best cinematic achievements have had none.
This issue could easily be resolved in wondy by way of
A) Have her fight non godly metas such as Cheetah or other C listers as you call them, worked fine for Thor/Ironman and Batman. Good writing is the difference between a good and bad villain as far as I'm concerned.
B) Have the gods show up in something akin to the new gods of new genesis. I personally have zero issue with that, as far as the DCU is concerned alot of these divine power sets are relatively equal..
As for the mythic element on Themyscira: If those woman can be depicted with the same level of zealotry as say
Then, for me it works. The spartans in that film had absolutely nothing do to with pulply greek mythology and gods and such. They can believe what they want, if anything it will infuse the character, and really push the fish out of water angle. After which, see B).
As much as I hate the movie Troy, it nailed the concept in my opinion. Myth is filled with people believing they are being pushed and helped by gods at every turn, when they simply might not have been. I think that's a fascinating approach to wonder woman of all characters. It would be akin to historical greek heroes.
There is no reason why like Leonidas in 300, Diana can't climb enter a temple sitting atop a mountain and ask the orcacle for advice...none. Let them model their society and beliefs and buildings after the greek myth.
If wonder woman fights interdimensional demons from a place she calls hell, I'd be happy to receive it as wonderwoman as long as other things remain in tact.
All that being said, it's a rumor. Given what that one producer said about his thoughts on the property, I doubt any of it is true.