Platini had positioned himself as one of the most outspoken opponents to Blatter's regime, and publicly called for him to stand down after seven Fifa Executive Committee members were arrested on corruption allegations in raids in Switzerland prior to May's election.
Blatter ignored those calls and was duly elected for a fifth term as president, only to announce his intention to stand down on June 2 as world football's governing body became mired in scandal.
Platini, a former Juventus and France star, eventually decided not to run in May's election, having apparently seriously considered doing so at one point.
None of those who have so far come forward appear as credible a candidate as Platini, who has been in charge of Uefa since 2007.
Former Brazil star Zico lacks any experience of international football administration while Liberian FA chief Musa Bility is unknown outside of Africa and Diego Maradona, who has declared an interest in standing, is unlikely to be a serious contender.
Jordanian Prince Ali, who took on Blatter in May's vote, got much of his support from Uefa members and so would be likely to give his backing to Platini rather than stand against him.
Candidates have until October 26th -- exactly four months before the vote -- to come forward. They must have the confirmed backing of at least five of Fifa's 209 member nations, and be cleared by the world governing body's ethics committee, to be able to stand.
Platini has made increasing calls for reform of the world body in recent months. These have been heightened since US authorities charged 14 people -- including the seven Fifa officials arrested in Zurich -- with corruption.