So, this happened.
I get that this happened, as the image was of TMNT maquettes used as part of the film-making process and were not for official release. I don’t get that my source for the image - and to which my post linked - is still hosting these images, although the original source - watermarked on the image - has also been forced to remove them. If you search Tumblr for ‘DMCA’, you’ll find more of these TMNT images have been removed (among a great many other things, of course, and some of them legitimate cases of infringement).
I assume these DMCA suits are at least peripherally aware that Tumblr - and the internet at large - is mostly comprised of copyrighted works, shared by fans and enthusiasts with a love of the material. I mean, I didn’t charge people to look at that Leonardo maquette; I don’t make a penny from my Tumblr - I was just happy to share what looked like a cool image from the new TMNT movie.
I also posted another TMNT image this morning featuring a photograph of a TMNT advertising stand at a game or toy show - my source for this was exactly the same as the Leonardo maquette. I don’t know whether that offends copyright or not. It’s official publicity material, but photographed by a member of the public. Grey area, and I don’t know. I’m not a dick in a suit, so I don’t have the information on that.