will be the first time that Cena is not in a title match @ Wrestlemania

Wrestlemania 20: John Cena def Big Show for the US title
Wrestlemania 21: John Cena def JBL for the WWE Title
Wrestlemania 22: John Cena def Triple H for the WWE Title
Wrestlemania 23: John Cena def Shawn Michaels for the WWE Title
Wrestlemania 24: John Cena lost along with Triple H to Randy Orton for the WWE Title
Wrestlemania 25: John Cena def Edge y Big Show for the World Heavyweight Title
Wrestlemania 26: John Cena def Batista for the WWE Title
Wrestlemania 27: John Cena lost to The Miz for the WWE Title

Not surprising, based on when his push started (right after the first Mania that he missed) and how quickly his push took off.