If I am misunderstanding the above comment, then please correct me, but as it reads to me:
I must say (and I did indeed create a forum account to say it) that this news, that the base game maps are now "locked" until the sequel comes out, is very concerning to me.
Tower3D! Pro, which has only been available on steam for 14 months, is a very solid game although it does seem to have some engine limitations. And while I recognize that it is implied that things will get a lot better in the next product, I feel uneasy hearing that the existing product will only receive support for its DLCs. I respect the work needed to create a sequel, but I am unable to understand how closely the base maps are woven to the core engine of the game.