The trailers for Ready Player One have shown us that the movie version will do some things differently from what took place in the novel and this scene would be one of them. There is no scene in the book where Parzival puts on a suit for any reason. He appears to be infiltrating someplace and doesn’t want to be recognized, and while there is an important part of the book where something similar happens. That infiltration is done in the real world, not the OASIS, and Wade Watts, the real-life controller of Parzival, does so completely on his own, without the help or even the knowledge of Art3mis. This means this scene is either a drastically reworked version of what happens in the book, or an entirely new sequence.