As noted earlier here on the website, Randy Orton will wrestle Alberto Del Rio on Friday's SmackDown in a match to determine the #1 contender to World Heavyweight champion Sheamus. Del Rio wins that match and will wrestle Sheamus at Night of Champions.
There is word that Orton may be the special referee for that match but that is not confirmed as of this writing.
Oton has been sparingly used since returning from a 60-day Wellness Policy suspension at the end of last month. Orton is expected to leave WWE again in the near future as he'll be filming the new WWE Studios movie, "12 Rounds."