Originally Posted by storyteller
Why can't people manifest powers? I think Shields idea to put together an Avengers team stems from all the weird people. Stark forced them into action because he publicly announced himself as a superhero.
Basically I'm trying to say is just because we haven't been shown all these metahumans, doesn't mean they don't exist. It may just mean they aren't publicly showing themselves.........until now.
On the last AoS episode, SHIELD knew about that Chinese guy with the non-Extremis-based fire powers (even though they didn't know where his powers came from), and they had been tracking him, and encouraging him to keep it hidden. Coulson even said that they had a list -- albeit a short list -- of people and items that they knew about. There's also the map at the end of IM2, which seemingly highlights Wakanda and Atlantis.