I guess it makes sense, given all Sting has done to the lead up to this match, if HHH lost, where would he go? Stay as COO despite losing to Sting?
Sting doesn't know if he'll be back, so this is fine for him, and if he does return to wrestle The Undertaker, its all good. But HHH will continue to be on every RAW to come in the foreseeable future.