Anand declined the honour, pointing out that when he took part in the Fide World Championship, he signed a contract not to compete in any rival version. Even if that is not legally enforceable, he says it is a matter of honour that he keeps his word.
Now it has been announced that Alexei Shirov will take Anand's place. Shirov will play Kramnik in May; the winner will play Kasparov in October. And confusion will reign until further notice.