Shinobi, right now players are limited to one major character. Eventually we'll open up to people having two, maybe even three main characters. But yeah your characters can have a small supporting cast. Keep in mind that any sidekicks have to be at least sixteen. And that I intend to create several NPC heroes who act in mission support roles so there's a risk any supporting characters might become superfluous. But you can still go for it. 

Vita, what are your thoughts? 

Asuras, that's right. Everyone is still in the early ages of figuring out what they can do. Zenith and all the other Metahumans and Supernaturals can evolve their skills. There probably won't be very many "Doomsday" or "Silver Surfer" types but they can appear.