Fans weren’t the only ones surprised by the appearance of the cute alien currently known as “Baby Yoda.” Manufacturers told CNBC that the little green creature was absent from the promotional materials they were provided ahead of the release of “The Mandalorian” on Disney+. Some had been told that the titular character, played by Pedro Pascal, would care for a child at some point during the series, but nothing more. The Child — or “Baby Yoda,” as “Star Wars” fans have been affectionately calling the character — wasn’t showcased in the marketing or prelaunch merchandise for the new Disney+ show because showrunners Jon Favreau and Dave Filoni didn’t want to spoil his surprise appearance. In the case of this breakout star, companies such as Fifth Sun were “literally developing the moment ['The Mandalorian'] aired,” said Trey Swartz, director of business development at the apparel company. After the first episode aired, companies were given some 3-D models and renderings but remain in the dark about the character’s future, just like audiences. It’s why most fans have noticed that retailers are ...