You missed the point.The dark, open end is fantastic!
If the film had ended the way most of you here seem to want then it would have broken my heart and destroyed my immense respect for the writers of this.
Throughout the whole series we saw various humans abuse power, do anything to achieve the philosophers stone. By the time ed and ai had matured their goal wasn't self serving: to bring back their mum, to save their bodies it was to try and prevent suffering! They already felt responsible for various people's deaths. do you really think ed is just going to risk the gate being open in the nazi world, where the lives of populations in 2 worlds would be at risk when someone eventually discovered how to open it! Is he going to jeopordise billions of peoples lives just so him and his brother can gang bang winry?! After the development of these 2 characters throughout the series i thought that this would have been,not obvious, but I didn't expect people to be demanding some perfect ending! That would have been disgusting, for me personally but everyone is entitled to their view. I just wonder if they considered the whole scope of the series. The ending isn't really leaivng that many questions, they're going to carry on the same quest, to prevent humans trying to obtain the ultimate weap
Plus with hawkeye and mustang......the whole point of that is unrequited love. He cares for her as a soldier, he knows that she likes him and that's why he keeps her close! She's the most loyal officer, the reason she is his second best is not because he likes her but because she will follow him, no matter what! I admit, I also wanted them to get together, but only in my head, for them to have done that in the anime would have been counter to everything that had been played out.
As regards to a sequel? What?! This isn't america. this isn't prison break where if something can make money then keep crapping out episodes until no one can stomach it anymore. Any ddecent american series are mostly ruined by making too many series and fearing to try something new and risky. The anime was beautiful, almost twice the length of usual animes and managed to stay gripping throughout.The ending isn't really leaivng that many questions, they're going to carry on the same quest, to prevent humans trying to obtain the ultimate weapon but in a different world. Do you really want a sequel where they are running round in the 1920s, unable to use alchemy!?!?!? hmmm
A happy, soppy ending would have in no way fitted this anime as the themes in it throughout are incredibly dark and thoroughly rooted in problems that we still deal with now.
GENETIC ENGINEERING
They committed the ultimate taboo!
It focuses on genetic engineering which is becoming an incresingly important topic in real life.
What does it mean to be human?
The homunculus have human like bodies, they act like us but dont' seem to have a soul yet some of them retained faint memories. When AI is in the armour he has part of his soul but no body, so is he human? Think of someone like Tucker, the alchemist who made a chimera out of his own daughter. He has a soul and a body but would you classify him as human?
THE WAR
America acts like the fuhrer. They want to take over territories but have fed their people lies about democracy and freedom. like when the fuhrer tries to provoke the people where rosa was the holy mother of at the end to attack first. "we stand for peace, it makes things easier if we attack first."
It also focuses on discrimination, the people from ishbal with dark skin and red eyes, even ed says he is scared of them because he is not used to it.
Ok, this is getting long now but you get the idea. The rosy, happy life they gave up when they committed the taboo and they spent the next years trying to fix that, growing up along the way and changing their goals.