Do you really want Janet Napolitano to have the power to appoint someone to a U.S Senate seat?
Why not? In the first place, the nominee must be OF THE SAME PARTY as the Senator being replaced. Secondly, Napolitano is a very popular Governor up for reelection next year. Her future depends on conservatives staying home. She will not provoke them with an off the wall nomination. Finally, the appointment would be a one year appointment until the next general election, in this case coinciding with what would be the end of Kyl's term. She could use the appointment to preempt a popular challenger for her office. In any case we would likely get a more conservative appointment than if it were a Republican making the choice.
The Democratic nominee will be Jim Pederson who financed Napolitano's election. The more conservative the Republican, the better his chances are.
That said, Kyl will not be selected.