Speaking with The Hollywood Reporter, Corliss shares his reason: the ugly, longstanding A.M.P.A.S. bias against animated films.
"The Academy membership has never believed animated features deserve to be rewarded with the top Oscar, any more than documentaries or foreign-language films," he says in part.
"I'm flattered to be told my designating Toy Story 3 as the year's best movie would spur members to vote for it—except that two years ago I put WALL-E in the same top slot. Didn't mean a thing."
(Last year, Corliss named WALL-E the best movie of the decade.)
Read Corliss' complete comments on THR's The Race blog.