Nice, I was hoping they'd keep this going. Prize pool seems reasonable; given the price of power, I understand how they can't offer a full set.
(I won't be able to make this for a variety of reasons, but really enjoyed the last Power 9 and highly recommend it.)
Event poster's still MIA, but we've got our 1st-place proxy! 
Working from the assumption that Vintage is in a bad place, I find all of @brianpk80's proposed restrictions to be completely reasonable. Not sure about the bannings, though I see where he's coming from. Now, as someone who enjoys contemporary Vintage I'm less sure about all this, but I still think this was a well-reasoned piece.
Vintage Singleton sounds fucking miserable, though.
Amateur question: what are you guys boarding out against Dredge? Bolt seems like an easy cut, but then are you looking at . . . countermagic? Snapcasters (because of Cage)? Artifact destruction?
(poster's delayed cause of SXSW - hopefully we'll have it done soon!)
Location: Lazarus Brewing (1902 E 6th St)
Entry Fee: $10
Registration: 10:30 registration, with an 11:00 start time
Payout: 100% of entry fees go to the top Top 4; unique proxy card and invite to year-end championship for 1st Place
Proxy limit: Unlimited proxy
Proxy rules: While we love real cards and beautifully-rendered proxies, it’s more important to us that you’re just here and playing. As such, we’re not instituting any proxy rules or guidelines.
Decklists: We will be collecting decklists to post online after the event.
Wanna know what the competition looks like? Check out our previous events here, or read our analysis of the 2018 Romancing The Stones metagame.
Some type of White, GW, or Junk Hatebears comes to mind. Otherwise Moon Stompy (which you mentioned) sounds right.
@ChubbyRain that makes sense! I'd been thinking Abrade was useful for its flexibility and dodging Misstep, but you're probably right that Bolt is just better. I'll give that a whirl.
I don't yet own Trops, Tundras, or a Library, but wanna try this Xerox thing out. I put together this UR list:
4 Snapcaster
1 JVP
3 Pyromancer
3 Dack
1 Ancestral
1 Brainstorm
1 Ponder
1 Probe
1 Flusterstorm
2 Spell Pierce
4 Misstep
4 Preordain
1 Time Walk
4 Force of Will
1 Gush
1 Cruise
1 Dig
2 Pyroblast
2 Bolt
2 Abrade
1 Lotus
1 Ruby
1 Sapphire
4 Volc
2 Island
1 Mountain
7 fetches
1 Strip Mine
2 Wasteland
1 Pyroblast
2 Null Rod
4 Shattering Spree
4 Cage
4 Leyline
In testing it's been solid so far, but open to suggestions from experienced Xeroxers.
UR Delver is reasonable without power - I played it in a side event at SCGCon last summer and had a good time. @Thewhitedragon69 is right that you absolutely won't be optimal without Lotus et al - you're giving up all your most busted plays, and you'll have a harder time clawing back into the game when you're losing - but you'll still be able to play and win games of Magic. Access to stuff like Null Rod will do a bit to close the gap between you and the powered players, and you can mess around with cards people don't normally play around in Vintage (Daze, Price of Progress, etc).
Landstill sounds reasonable to me, though I don't have any experience with the archetype. You might also be able to make something Jundy work.
I would avoid decks trying to do unfair things.