In an alternate Equestria, the events of Discord's return play out very differently and lead to a desperate letter from Twilight Sparkle to Princess Celestia; however, Twilight's spell to ensure the delivery of her message unintentionally transcends time and space, and travels to our Equestria during our Twilight's mission to the Crystal Empire. With Celestia's protegé already occupied with matters of great importance, it is up to Luna's far younger student to venture into an alternate Equestria and attempt to guide seemingly familiar ponies to a brighter future.
Chapters (3)
So is the foal is king sombra's son?
Not bad pretty job dude. hell i think you have better grammer then me.
this is going to favorites
2076876 No, he isn't. I wrote that bit from the foal's perspective so I know it's a little vague, but the stallion and mare who were with him during that part were his parents. The booming voice coming from outside the house is Sombra.
(Hoo, took me awhile to figure out how to get this reply in the right place XD)
2077220 Thanks! The prologue chapters kinda got out of control because I forgot my original strategy to use outlines to stay focused. Sorta like Twilight's checklists
But hopefully I should be back on track now that I can start where I'd originally intended to start the story! 
It begins.
Some thoughts:
1) You need to create a new paragraph for each new speaker. That means that two characters should not share a paragraph while each have dialogue. For example:
"Look out!" Twilight screamed at Applejack, the mare barely jumping away as a large boulder smashed down on what used to be Town Hall.
Applejack groaned, sitting up on her hunches. "Phew! Remind me ta never, ever yell at Spike when he's larger than mah farm is wide! That weren't fun at all!" Twilight rolled her eyes as Spike continued to throw a gargantuan tantrum.
Note that the two speakers aren't sharing dialogue paragraphs, but each has ash action they do while the other is speaking. This is important to note.
2) There really isn't a high end limit to the length of a chapter here on fimfiction.There is, however,a minimum length, and you're well and far beyond that, so I must congratulate you on that.
Those two things were all I had for now. Keep it up!
So first off: I forgot to remind you that Ponyville didn't exist a thousand years ago. Granny Smith was one of the original founders of the town, and she's just pushing something like 90. So... yeah. Wanted to point that out. Other than that, this was a fine prologue. Just work on the few things I pointed out, and you'll do fine.
3247217 Definitely appreciate the tips! I guess I've let my dedication falter on this story, but I definitely haven't given it up, I've still been throwing nuances around in my head, even if I haven't been writing anything down. Revisiting this has possibly sparked some interest again though!
3247273 Thanks! X) Though I didn't realize I'd placed Ponyville back in the pre-Nightmare Moon time period, I'll re-scrutinize my work and definitely rework these chapters with the dialog tips!
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It's no trouble, really. I fancy myself a bit of an editor, so I kinda like telling other people where they went wrong (lol, jk).
If you ever need someone to help out, though I may not be available, there are a few groups you could look at that might have someone able to help.
Proof-reading, Pre-Reading, And Editing
Looking for Editors
The Proofreader Group
Overly Extensive Editors
Editors-R-Us
Hope that helps! I still really would like to see where this was going, it just sounds like a fun adventure!