Yoda says... "A path to the dark side, watermarks are. Wish to use the photos without watermark, people will."
That said, it's a well done watermark... but I'm very anti-watermarks. lol
Heck, I'm not even really happy with the watermarks on the MiceAge photos, but they're so small I can't use them for my desktop background anyway. lol
I suppose it depends upon what you want the photos used for... if you want people to put it on their desktop, don't use a watermark and use a high quality large version. Otherwise most won't care.
Keep in mind that you don't have the entire copyright to the photo... Disney has a larger chunk than you do. So don't get too into Disney Photography for your own profit, or for that matter, thinking that no one will use it... because, they will take it, and use it on their own site, cutting off the watermarks if they have to.