Seems almost too simple (and predictable.....not that that's always a bad thing):
Sting and HHH face off at Fast Lane, setting up a match at 'Mania, probably some sort of stipulation that should Sting lose, he's fired (has it even been acknowledged in storyline that he's a WWE employee?...not being an asshole, I just don't remember it being said) or banned from WWE or something along those lines; if Sting wins, he's named Raw GM or WWE Commissioner (my personal favorite choice) or something along those lines.
wk
Sting and HHH face off at Fast Lane, setting up a match at 'Mania, probably some sort of stipulation that should Sting lose, he's fired (has it even been acknowledged in storyline that he's a WWE employee?...not being an asshole, I just don't remember it being said) or banned from WWE or something along those lines; if Sting wins, he's named Raw GM or WWE Commissioner (my personal favorite choice) or something along those lines.
wk