AN: I'm going by the Coldlight downloads, so if my single quote isn't in line with your preferred translation...Eh.
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"Now, it's time to revive! To my sponsors, and to the TSA who made this world, and to the Saint Church, which lauds a hypocritical piece..."
"Yes, yes, we've heard it all before," Nanoha muttered.
"Can you see it? This is the absolute power that you longed for even as you avoided it."
"Getting impatient? We agreed to leave this loop unchanged, Nanoha, and if you didn't want the same old speech, then you should've voted differently."
"That which in the old years created a world, and then destroyed it. The demonic wisdom of ancient Belka...Is what I would be saying, had I left my original plans unchanged once again."
"Yes, I know, it's just-...Wait, what?"
"Instead of the Saint's Cradle, which I originally found, I've decided to use a different flagship, one from another departed culture..."
"Did any of us do something to point him towards a different plan?"
"Not me, and I haven't heard anything from Yuuno about another dig."
"And frankly, infinite chances or not, I was getting a bit sick of being blown up and imprisoned by you and your team, Yagami-san. Even my patience with information-gathering can run out, so I decided to try something...different."
"Is he implying-?"
"Honestly, it was pretty simple to weld Alteran tech and my AMF weaponry together, and with several ZPM's from that interesting little galaxy, I think I've constructed something quite wondrous."
"Hayate, his base is rising out of the ground! It looks like a city of some sort, shaped like a snowflake..."
"But despite my many modifications, this is still Atlantis!"
A swarm of yellow ovals emerge from the rising city, racing off towards Cranagan, followed by several flights of rounded green shuttlecraft, as Jail began to smirk.
"And I assure you, this battlestation is fully armed and operational."
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This would be set fairly early in the Nanoha loops, after they've branched out and started getting transplanted between other universes, but before they've had much experience with seriously fighting looping opponents.
I'd like to say any experience, but I haven't reread the other loops to check for Nanoha cameos, so I wasn't sure if I'd missed a reference to their first looping villain, or at least their first native looping villain.
As for why Atlantis, well...I wanted to do Rapture, after I'd just finished playing Bioshock 2 several times, but that seemed a bit too much, no matter how much Jail managed to pick up from the loops and other canons while feigning non-Awakened status.
Massive practice at Hidden Weapons after a fairly tame Ranma loop combined with study and partial reconstruction/partial theft of Alteran bits & bobs, on the other hand, while still out there, seemed a bit more plausible, not to mention effective and easier to keep control of with Jail+Numbers+Gadget Drones.
Honestly though, any massive, powerful, possibly historical flight-capable thing would've done. The Star Forge, High Charity, or, uh...Huh. I don't actually know that many city-sized battlestations outside of Star Wars. Well, fill in the blank with your own favorite pick.
And I considered filling in more detail about who said what, yadda yadda, but my attempts just felt awkward and unneeded. Nanoha's got an obvious line, besides the one with her name attached, and the underlined dialogue is from Verossa's communication, but other then that, who said what is up to the reader's preference.
Assume pretty much the whole of the RF6 big-names are awake. Hayate & Rein, the Harlaown family, Yuuno, Vivio, the Forwards, but that's it for the good guys. Jail, obviously for the bad guys, but beyond that, I don't think so.
The Numbers might be a bit too disillusioned...or in Quattro's case, traumatized, to go along with his revised plans.
This is it for me. I'm pretty sure this is my first snippet, or at least the first I remember, and I'm going to stick with an approach of "Less content, less chance to screw up." If, on the other hand, someone wants to continue, or revise, feel free.