What makes you think Haley wants to be part of those plans? She walked away from Trump. She wasn't pushed out.
Haley wants to be president. (Don't they all?)
I can see her running against Trump in the Republican primary if his popularity numbers were to go down significantly.
She could claim the only reasons she served in his administration at the United Nations was because of her respect for the international body, and because she felt duty-bound to save the world.