Iron Man 3 was the first Marvel film to only have the Marvel Studios logo
You’re thinking of Thor 2.
The Paramount logo is still there in Iron Man Three.
My main point with my long-winded post was that the overseas distribution rights for the three Iron Man films may very well have been signed away well in advance of Iron Man Three even being made. That’s why, all these years later, Concorde is able to put them out in UHD in Germany before Disney gets around to releasing anything on the format themselves.