Showdown tournament requirements

The current showdown tournament requires hof acrobat. But many players don't have the required superstars to play the showdown. What should we do then.? If you make a requirement of certain types of superstars. You should provide every player with that type of superstar doesn't matter it will be S tier, A tier, B tier or C tier. Atleast we should have one superstar of that category which is mandatory to play showdown. And If you couldn't provide every player with that superstar. You should not have to keep such requirements.