The Avengers believe that the Phoenix Force will destroy mankind .
The Uncanny X-Men believe Phoenix Force will bring mutantkind to Phoenix Force 's former glory after House of M. Only a war can create a win - win solution - though in the process , Professor X will die .
The Avengers believe that the Phoenix Force will destroy mankind , but the Uncanny X-Men believe it will bring mutantkind to its former glory after House of M. Only a war can create a win - win solution - though in the process , Professor X will die .