#2 Should defeat - To establish himself as the best member of Evolution
It seems like WWE wants to establish Triple H as the supreme member of the faction, Evolution. They first announced the faction's reunion for SmackDown 1000, then booked Batista in a meaningless feud with the King of Kings. Now, they are having Randy Orton do the same.
Triple H had lost too many matches in the past few years, and thus, it looks like he wanted to defeat some legends to regain the pole position once again. He even defeated the Undertaker at WWE Super ShowDown last year. These victories hint that Triple H wants to be looked at as the strongest legend active in the ring.
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Evolution was considered to be the most dominant faction in WWE history, hence the creative team wants to end that story by having Triple H emerge as the best member of the group.