Possibly v148 this week?

I think you're wrong.
It wouldn't have the same mass as the rest of the game, but that in itself would appeal to some.
There are players who preferred Maple when it took effort and had milestones, even if the extent of that effort was ungodly slow XP gain and crap damage.
Some people like what they perceive to be a challenge and would be happier trying it old school, and having the option of flipping between the two at whim via characters on existing servers and characters on the nostalgia server would ensure it had a steady stream of visitors from the existing population wanting a taste of what it was like 'back then' before they go back to their happy superiority of being truly awesome and godly (like everyone else).

That said, it still has an approaching zero probability of ever happening.

I'm sure there's a few people who would genuinely enjoy the old school Maple, because there were people who got Lv.200 and enjoyed the entire grindfest that it was back then.

However, I do not think that 99% of the people who complain about current Maple, say old Maple was better, and cry for this Pre-BB Server would really play it after the initial thrill wore off. You'll get a few, but not enough to warrant the creation of the server in the long run.

Sure, some people genuinely miss it, but I doubt most of them remember truthfully how bad it was. Most of the arguments towards it are about PQs, which only take you so far and after a certain amount of playing them they get boring again. Above that the current PQs aren't even that bad, and if they put a little effort into building a party they would have the same thing they complain about the game missing now(making friends and all that jazz). The only real difference between old PQs and new PQs in terms of community and all that, is that the new PQs are not required, while the old ones definitely were if you valued your sanity.

I really doubt a "Rewind" Server would be decently populated for much more than a couple weeks, a month at the most, which is why I'm sure Nexon will never do it.

To add onto this, I think the thing people want the most is a cube-less server, to them, that's "old school" maplestory, and as long as they get that factor right, it could bring a pulse back into this corpse that has developed stage 120 power creep

Pretty much the only reason I have faith in MapleStory 2 is because of their ability to restart and get away from the massive gameplay failure that was Potential, without causing the massive uproar that removing it in MapleStory 1 would cause.

Even if they made a Pre-BB/No-Potential server for GMS, I don't think it would really do much. People say they want it, but I would be surprised if more than 10% of those people actually meant it, and would actually play a server without their broken gear for a prolonged period of time. It's just too ingrained into the game's society at this point. People talk big, but don't follow through. Just look at how many people have sworn off Cubes, then later complained that their Cubing went badly. It's all talk.