Not exactly true, they have hacked the end of the copyright for SteamBoat Willie, by adding a few second extract of it, as part of the actual "Walt Disney Animation Studios" actual logo.
They cannot sue anymore for copyright infringements, but they may do it the registered trademark way, by saying "It's in our logo !".
They cannot sue anymore for copyright infringements, but they may do it the registered trademark way, by saying "It's in our logo !".