Prep for Big Bang in GMS

I wouldn't hold my breath. Seriously, don't expect it to be quick. Though other things, like Dual Blade and the Chaos bosses, are being ported into GMS very quickly, those are only minor changes compared to what an entire game changing patch is.

You're not a programmer/software engineer who worked on the code, so you don't know how fast it is. I understand how someone from our viewpoint - almost entirely ignorant end users - can logically conclude that it would take a long time, and I want to warn you against making such assumptions. Both Nexon American and the Korea-based Nexon make money off of content transfers, and after some five years I would think that they would come up with a way to stream line it. As you have seen lately, they've become efficient at it - we got arans/evans earlier than we expected, and dual blade a lot earlier.