It seems like The United Nationalist Alliance (UNA) Senatorial Lineup are almost complete. I am interested with the upcoming Senatorial Election on 2013 and will keep you posted with all of the possible candidates.
Here are some of the names from United Nationalist Alliance Senatorial Lineup
Representatives Gwendolyn Garcia
Joey de Venecia
Rep. Jackie Enrile
Rep. Joseph Victor Ejercito
Sen. Gregorio “Gringo Honasan II
Koko Pimentel ( which everyone is speculating will leave the alliance as Miguel Zubiri joined the bandwagon.