Frank Castle was taking down a group of scince criminals, when he was captured and injected with a modified Extremis virus. He survives the process, and now inhabits a perfected body.
1) Extremis can be modified to have different effects from the standard package. What abilities would be good to give to Frank?
2) How would Frank start fighting if he as a legitimate superhuman?
3) How would Tony Stark feel about an extremis powered Punisher?