Hiya, thanks for the kind words. To answer your questions:
Space land will return, I took it out as it was incomplete and I wanted to redo it and I am currently working on it, seeing the feedback from people makes me want to add the starting room back but far more true to the original.
As for every zombies map, I plan to do as many as I can but when it comes to bo4 and Cold War, I don’t think it’s feasible. Not only are the maps horrendously optimised, having absolutely absurd material counts and draw calls, they also use Super Terrain which is CODs new way of doing terrain and landscapes. Super terrain is impossible to port over at the moment, so maps would be missing geometry.
While BO3 doesn’t have the super terrain issue, its maps are still badly optimised, not to the extent of BO4-CW, but it’s still rough. Treyarch just slap decals on everything for blending and layering meanwhile other games take the correct approach and use material layering which is vastly better for performance and looks better too. I do not plan to do the chronicles maps atm, but perhaps I’d give the giant a go though as it’s a bit different.
As for call of the dead, when I finish up ascension and Five which I’m currently working on I will probably do that next, for custom maps I won’t be ripping bo3 custom maps but I am able to do WAW custom maps, they’re ancient and essentially abandoned so I think adding them to Project Aether is cool, I’ll focus on challenge maps first like cheese cube and octagonal ascension.