With FIFA's technical and tactical analysis of the 2014 FIFA World Cup finished, I cant see why the would reward the AFC with a play-off against the OFC. CONCACAF and CONMEBOL surely did way better with there (FIFA funded) resources.
Although there was no OFC team, And Mexico made it to the 2nd round - I doubt FIFA would make us play off with Sth Americans as I once believed - I think it would pretty much be the same deal as last time.
TV rights Money wise for the play-off just might change things.
OFC/AFC playoff = No money (Australia in 97 & NZF(2010) made cash from live gate same with Iran/Bahrain)
OFC/CONMEBOL playoff = No money (Australia and Uruguay* only made money from live gate)* Uruguay sold there home game for twice as much money then Aus.
OFC/CONCACAF playoff = Money (NZF made top dollar via live gate and TV rights)
AFC/CONMEBOL playoff = No money (Jordan made nothing live gate was poor due to small stadium)
AFC/CONCACAF playoff = Money +
CONCACAF/CONMEBOL playoff = Money +
+ To lazy to look the rest up from AC Nielsen.