I don't really understand why you'd want prebans not fo count, it seems against the spirit of the market. If the card is so broken as to be banned before release that feels like in the spirit of "banned within two weeks" to me.

@Ajelenbogen Historic has had a zillion prebans for format curation reasons, often of cards like Lightning Bolt or fetchlands that are not really "broken" in the traditional sense. I think including prebans like those would be against the spirit of the market.

Plus part of the spirit of the market is "Will WotC make a huge mistake with card balance", and prebans are not that kind of mistake.

@Multicore I guess I would just add newly printed to the requirements since the historic prebans are all reprints. I think prebans do, the vast majority of the time, imply a massive card balance mistake. The weird part is that with the no prebans rule you have to ask questions like:

"Well card X in Astherdrift is obviously broken in format Y, the question is will they preban it because it is so broken or will they wait two weeks?" Which feels pretty weird to me."

But maybe this is all too in the weeds.

Same question but 4 weeks instead of 2:

Given that Nadu took over 2 months to be banned despite very obviously needing it, I doubt this will happen outside of a coincidence. (along the lines of, a set with an OP card is released less than 2 weeks before they release their regular ban announcement)

@Nightsquared Put a limit at 35%

@Nightsquared This happened a couple years ago with Tibalt's Trickery in Modern. Not a high base rate but not nothing either.