Okay, so can read this review, after U saw the whole series.
Ed is now in our world. He always tried to travel back to his one, but he cant. He learned the ways and secrets of technology, but thats not alchemy. He found Als alterego, and with him, they built a rocket. On the other reality, Al joined the Master again, and learned alchemy. But after she died, he travel the lands, to find his brother. In Eds Reality, a secret german group, tries to open the gate, and brought weapons to their world, to support Hitler With Hohenheim, "the dragon"... and Angers help, they open the gate. The germans attacked Als world. The alchemist fight back, including Armstrong, Mustang, Al and Ed too. This was a fine ending for a great series!