User blog comment:B00m666/The special edition on 31 dec/@comment-24021431-20131007002704/@comment-6697950-20131007042319

There is no way they would start the 4th arc with the second season, unless they are not right in the head. The arc is as big as twice that of the other main arcs put together, so it would need about 1-1.5 seasons of its own.