A troubled teen is mysteriously abducted and transported to a secluded training facility, where he and a band of juvenile misfits encounter an otherworldly enemy in a struggle for survival.

Try to make the logline as succinct as possible. Eliminate the the word "transported", since an abduction already gives us that he was "taken". Obvious somewhere. For the lead, how about adding a personal trait that makes him stand out, let's suppose, juvenile tactician. A key detail since he's gonna go head to head with a superior out-world intellect.

It might be more interesting if the teen is not troubled - abducted teens that are not "troubled" is against the norm...and therefore more compelling. Maybe you could make the group "girls" to differentiate it more from the maze runner... these are just suggestions. Good luck!

Hello, in my opinion you have a kind of structure in the genre of "maze runner" but you should add some small precise details to make the logline more original and interesting.