You can't do 100% Greek actors, nobody would show up.
They did show up (more on that later)
IMO, they also would today. It would be seen as something different and "fresh", not niche, especially today where everyone has internet access and can instantly verify historical facts, details regarding authenticity.
The problem is that Greece doesn't really have what you'd call standout or globally famous actors anymore. There used to be GREATS like Melina Mercouri, Irene Papas, Katina Paxinou, and Giorgos Fountas and Manos Katrakis but they're all gone now. So you'd likely have to rely on lesser-known actors, which isn't necessarily a bad thing. You don't need "star power" as much as you need genuinely good performances, assuming the final product is strong.
I actually think Mel Gibson is one of the few directors who could do justice to a project like that.
It also wouldn't need to be in Ancient Greek. Modern Greek would work just fine and would still carry the gravitas that these kinds of historical or mythological works need. Take a look at Giorgos Tzavellas' Antigone (1961):
Yes, the acting is very much of its time with that theatrical 60s style and emphasis on gravitas, but it still works.
Or consider Michalis Kakogiannis' Iphigenia (1977):
Irene Papas is absolutely majestic in that one.
Sure, the armor and production design aren't exactly hyper-realistic, but the spirit, gravitas, and pathos are all there - and that's with a fraction of the budget of today's Hollyweird.slop productions.
The aforementioned films won multiple awards at that Berlin international film festival, the San Francisco one, Golden globe awards and Iphigenia especially was nominated for best foreign language film, so, the audience for such products are definitely there...
Now, for something different :
IDKFA
- brother, for the love of everything that's holy, stop replying to the guy 'cause at this point, he's just (obviously) trolling and rage-baiting and the whole "discussion" is just going in circles, I still don't understand what the guy is trying to prove or who is stanning for, It's a lost cause at this point since it's like talking to a wall and personally , I'd like to keep my brain cells intact...