Dormammu has turned into a planet by overtaking Ego
Storm (the regent of Sol) is capable of unleashing her elemental fury on a global level, when she doesn’t have to worry about the consequences she can literally ravage planets to their very cores.
The Hadari Yao has channeled extra-dimensional energies before (see trion and extraordinary x-men 16)+ Ororo has untapped potential and affinity for the manipulation of mystical power.
This could really lead to an epic fight!