I know people don't like Smash, but this is the biggest crossover in video game history, maybe in all of entertainment. I don't think anyone can blame Nintendo for constantly showing it off. A franchise that started out as a simple brawler of a handful Nintendo characters then becoming the biggest video game crossover of all time. And to add to that the biggest fighting game series ever, beating Tekken, Street Fighter, Mortal Kombat, and more.
I get that it's big, I just personally find it annoying that even a year after its release they're still likely going to take up precious time in a major presentation just to show DLC for a game I don't give a crap about instead of stuff I desperately need to see like Bayonetta 3, BOTW2, or an exciting new game. I'm willing to bet we don't either any of that at the VGAs, just Fighter 5 and indie crap and probably a boring old port/remaster like Metroid Prime Trilogy HD.