It really rubs me the wrong way that all new Smash characters get individual CGI trailers while most of Nintendo's other game reveal trailers, including major titles like Mario Wonder and BOTW, either open straight into gameplay footage, a recycled cutscene, or basic text. Putting aside my personal gripes with Smash cameos being built up as important, I'm just really put off by the idea of being a developer for say, Mario Party, and seeing the game I worked on being revealed with narration over B-roll, and then Sora's cameo in Smash being given a bombastic Disney-quality cinematic trailer only a week later.
Compare the Arms reveal trailer - primarily live action footage with some CGI sections in a barren warehouse with only 2 characters and a bunch of disembodied arms - and the Min Min Smash reveal trailer - fully animated with proper backgrounds and the near entire cast of Arms portrayed in person. When you put them side by side it's actually shocking, and Arms has one of the higher budget recent non-Smash Nintendo trailers too.