The guild picture was blurry last I checked and really zoomed in so it didn't look like a pixel hat, my bad.

Regardless if it mixes two of them together then it's hard to count it as being stolen, the company may own the overall image and design but the concept of it is open for everyone.

Anyways, I think if a new tower was added it would need to be with the release of a new town because there's not much room on the current GMAP for one. (pretty much what Gitaz said)