The recent gestures and antics from the PAP govt, and information from civil servant friends, indicate that 2015 is the time of the election.
SG50 is also being used as a political tool for the pappies... I am not fooled. I remember the 25th National Day in 1990: 'One People, One Nation, One Singapore'... nothing in 'SG25' was as blatant as SG50.