Maps, heroes, game modes, weapons, skins? Is it so that people would still buy the original game to get that exclusive content? Or is it in the works?
It’s been explained before. They can’t just copy and paste that stuff in the new game. They’re using a different engine (well version of the engine) that doesn’t work the same way. Just compare the new Jabba’s Palace to the old one. You can see a lot of work went into making new lighting and textures. Ben even said bringing an old map from the last game takes roughly 60-80% (numbers might be off its an old tweet) the time it takes to make a new map.
One thing that ties into this (beyond just the engine differences) is that each of those maps was made for a game mode that may not exist in BII, such as Walker Assault. The maps in BII were built from the ground up for GA. While GA maps can and have been adapted into maps for other modes, WA maps were built around having 1-2 walkers. Not impossible by any means, but it does affect balancing whether they're there or not, as well as overall map design.