Is WWE in trouble? Are they running out of stars?

Yes. They are in trouble but nothing they can't get themselves out of. Keep in mind that they brought it upon themselves, firing Kennedy and Benjamin and overall refusing to push talented workers. They have plenty of talent that they keep down, like MVP, John Morrison, Christian, The Miz(who is actually kind of being pushed but not really), and as much as a don't like him, Kofi Kingston. They are doing better, though, pushing Swagger, Bourne, Sheamus, and Wade Barrett along with the NXT Rookies.