This will hardly occur in Singapore.
I doubt if any Singaporeans are keen on it. Those who paid up
have lost enough, to pay for another lawsuit they won't be very
keen.
Besides, if I'm not mistaken, majority of those who got the ODEX
letters are young people and their parents paid up for them. Not a
fat chance of getting their parents to sue ODEX and ask for the
money back.
Well according to the papers there are people who are willing to
sponsor and organize for the lawsuit against odex. Though we won't
know whether how many are receptive towards it