And the number of people who want Metropolis Pt 3 really shows that the fans should not be in charge of the music in any way whatsoever.
Do they even listen to the songs or the interviews? I have nothing but absolute, wild, full, untethered, unchecked and fanboyish praise, love, adoration and devotion for Metropolis pt.1 and Scenes from a Memory, but the band is on record saying that they added "pt. 1" just for the lulz and that they wanted to do a concept album and the idea to tie it with Metropolis, with a plot HEAVILY lifted from the Dead Again movie, came only later.
Furthermore, every character of the saga died in two chronologies, except for the villain. What even a part 3 is supposed to be about?
It'd be about a dystopian future where the population is controlled (and, spoiler alert, sometimes exploded) by giant Noise Machines controlled by the tyrannical Greater Northern Empire. They ban all music while hypocritically still keeping some for themselves and rule with an iron fist. Then, in the village of Ravenskill a man named Gabriel is discovered to have strong musical abilities and a singing voice that can heal wounds, deafen, change moods, and give people physical strength. His brother Ahrys wants him to use his singing voice to power up the troops so they can overthrow the GNE and avenge the death of his dead wife Evangeline. Gabriel is hesitant to do so. Then word of Gabriel's powers reaches the Lord Nafaryus (who's real name is actually - spoilers again- Edward) and he goes to Ravenskill to investigate. There Gabriel demonstrates his powers to Nafaryus who's impressed and moved. Nafaryus' daughter Faythe is then like "yo this reminds me of my childhood when I was running around listening to my music playah". Low and behold Faythe and Gabriel get the hots for each other start eyeshagging each other and Nafaryus is like "hell naw" and gives Ravenskill three days to surrender Gabriel or be destroyed.
Ahrys and Gabriel have an argument about his magic voice and giving him up to the army, while Faythe tries to convince her mother Arabelle to let her go and parlay with Ravenskill. She agrees, but sends her brother Daryus out there with her. Daryus has a real chip on his shoulder, because Faythe is daddy's favorite and no one has given him those cool nicknames like Faythe and Nafaryus which is a super important part of their family. Faythe manages to parlay with Ahrys and Gabriel (who btw also gave himself one of those names to mock the royal family), and Faythe and Gabriel exchange numbers and text each other "send nudes winky face". Faythe returns to try to convince her dad to parlay with her new daddy, while the family disappointment kidnaps Ahrys's son Xander and says "Yo Ahrys, Wonder Woman's coming for ya. Also, your brother or your son you decide". Ahrys is conflicted but decides to give up Gabriel, while Faythe convinces her dad to parlay with Gabriel at the Heaven's Cove amphitheater.
On the night of the third day, the moon starts hurtling towards the Earth. Also, Ahrys gets cold feet and goes to the amphitheater to confront Daryus. After dropping some mad bars, Daryus and Ahrys start duking it out but it turns out Xander followed Ahrys there. Daryus is like "hell naw" and explodes Ahrys' organs with a NOMAC. In front of his like 10 year old. Geez. Just as Daryus is about to finish off Xander (GEEZ), a hooded figure starts walking by and Daryus is like "yo this is that chosen one lemme ice this dude so dad loves me". So he stabs the hooded figure, and it turns out its his sister Faythe. Oops. She's like "you jerk you stabbed me" and starts dying. Gabriel shows up and is understandably mad that Daryus stabbed his honey, so they starts fighting (Xander too). Gabriel's like "hell naw" and uses a magic scream to deafen Daryus. Nafaryus and Arabelle show up and they're like "yo what why's everyone dead", and Daryus is like "WHAT'S THAT?". Gabriel starts given a "Previously on The Astonishing", and Nafaryus is like "bro you're magic heal our BABY". Gabriel's like "can't fam in law, I lost my voice" and Daryus is like "WHAT's THAT?". Then the townsfolk all come about and sing an anthem for Gabriel, someone gets him some herbal tea which inspires him to heal Faythe's wounds with his voice. Nafaryus is like "thanks fam" and deactivates the NOMACs and pardons Daryus, who's like "WHAT'S THAT?". No more dictatorship, and Faythe and Gabriel start going steady. Fin.
That's how I imagine it'd go.