Asia and North America are demanding an extra place based on the World Cup success of several teams from those federations. Despite the success of Japan and Korea, two Asian teams (Saudi Arabia and China) were also the worse teams at the World Cup so there bid is doubtful. South America is demanding an outright five places instead of four direct entry and a playoff with the the top Oceania team as it is now.
This could work well with the Oceania bid as in granting Oceania a direct entry then there would be no need for a playoff with South America. Africa also wants it, but remember when Charlie Dempsey voted against South Afroca as World Cup hosts and controversially gave his vote to Germany. This was to secure UEFA endorsement for an Oceania direct entry to the World Cup. Whether they hold to that is a diffrent story though.