As I posted here, Peter Gelb's go to sopranos have been:
Key: (performances in approximate roles) (simulcasts)
Anna Netrebko (124 in 12 roles) (7)
Angela Gheorghiu (92 in 9 roles) (2)
Renée Fleming (234 in 20 roles) (6)
Karita Mattila (143 in 15 roles) (3)
Natalie Dessay (78 in 8 roles) (3)
Research indicates that Deborah Voigt has sung more at the Met than any of these:
Deborah Voigt (241 in 19 roles) (5)
Netrebko will open the 2013-14 season with Eugene Onegin and will repeat in Elixir. Fleming will appear in her signature role Rusalka. Angela Gheorghiu is very much out of favor for personal reasons. Karita Mattila is repeating her Salome this season. Natalie is in Giulio Cesare yet to come. Neither of them can I find in the schedule for next season.
Perhaps he's cast his eyes about and they have occasionally lighted on:
Patricia Racette (148 in 12 roles) (1) She will appear on the simulcasts next season in Tosca.
Sondra Radvanovsky (161 in 16 roles) (1)
Marina Poplavskaya (45 in 5 roles) (2)
Barbara Frittoli (92 in 9 roles) (3)
I have nothing against these ladies, but might we also see:
Eva-Maria Westbroek (12 in 2 roles) (1)
Nina Stemme (11 in 2 roles)
Anja Harteros (29 in 3 roles)
I would welcome other suggestions.