Where screenwriters learn the form and logline their screen ideas.
the useful league
^ in summary - give your villain something he's actually trying to do ... and give it some stakes that would cause your heroes to actually need to, you know, react to it.
That's a lame motivation for your villain; he does what he does just because he wants to make the hero's work harder? Doesn't he have anything else up his sleeve? The more focused, specific and dedicated your villain is to achieving their goal, the harder your heroes are going to have to work to achieve it. If all he wants to do is 'observe', he's not a very strong antagonist ... in fact, he might not BE the antagonist in your film, the more I think about it. What are your heroes even trying to do in the story?
You have a total of 4 descriptions of your main characters they are; rich, young, spoiled and they are super heroes this is confusing. Better to find that one perfect description that explains them in fewer words.
Further more the reader doesn't know who the main character is, it sounds like a multi protagonist plot because of the use of plurals but no number was specified. This leaves the interpretation open to an arbitrary number of protagonists which makes this a very difficult concept to imagine on ones own.
Who is the story about? Is it one person? Two people? Three people? What is their relationship with each other? How young are they? Do they work as superheros or hold other jobs during the day and hero at night?
The reason this all needs clarification is because in order to find the concept interesting the reader needs to understand how loosing their powers will affect them seeing as this is the inciting incident.
Hope this helps.
You don't really need to say what their title is or why they came up with that title - that can be put into the body of the work. Concept is interesting though. Something like:
A group of spoiled superheroes must prove they can deal with the loss of their powers when a supervillain takes them away.