I got one.
What if one of us who is really powerful, maybe Arrow, loses control of his powers and messes with all of ours. But it only happens to the team members because we were inside the headquarters at the time.
So for me it could be like I accidentally revive all the dead but without having control of them, and it's harder since they are charged with my energy. It could be complete chaos, with a mix of all sorts of things going wrong.
What do you guys think?