The better example of a team show is THE FLASH. It's a team of super-heroes all in costume who get together and fight bad guys. The name is "The Flash" but that's just the popular IP that draws in the audience. Since "Justice League" is another popular IP name, it would probably get as large an audience. I love LEGENDS OF TOMORROW, but that's not a name that is going to bring in enough viewers. And because of that, it doesn't get a big enough budget to do the costumes and the special effects. The time travel itself is enough of a cost--since they have to dress sets for different time periods and have costumes for the period.