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.

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