If you can't wait one full week for Teatro alla Scala to announce their 2009/10 season (which they'll do Tuesday, May 26), you can find details via a website glitch that makes the roster accessible online.
You can peruse next season's calendar starting here. Next season's roster is comprised of the following operas:
Carmen (to open the season conducted by Barenboim, then later by Dudamel)
Rigoletto
Don Giovanni
From the House of the Dead (conducted by Salonen)
Tannhäuser (conducted by Mehta)
Lulu (conducted by Gatti)
Simon Boccanegra (conducted by Domingo)
Das Rheingold (conducted by Barenboim)
Faust
Il Barbiere di Siviglia (with Florez)
L'occasione fa il ladro
L'elisir d'amore
Onegin
Rigoletto
Don Giovanni
From the House of the Dead (conducted by Salonen)
Tannhäuser (conducted by Mehta)
Lulu (conducted by Gatti)
Simon Boccanegra (conducted by Domingo)
Das Rheingold (conducted by Barenboim)
Faust
Il Barbiere di Siviglia (with Florez)
L'occasione fa il ladro
L'elisir d'amore
Onegin
Special events are monopolized by The Dominger: a Gala for Placido Domingo, and the Domingo-Cafritz Young Artist Program of Washington.
Two ballet tributes (Serata Béjart and Serata Forsythe) will herald Don Chisciotte and Trittico Novecento.
The recital season is comprised of solo performances from:
Ildar Abdrazakov
Simon Keenlyside
Angela Denoke
Fiorenza Cedolins
Waltraud Meier
Sonia Ganassi
Simon Keenlyside
Angela Denoke
Fiorenza Cedolins
Waltraud Meier
Sonia Ganassi
And special soloists to appear are:
Maurizio Pollini
Krystian Zimerman
Lang Lang
Daniel Barenboim
Krystian Zimerman
Lang Lang
Daniel Barenboim