I'm guessing it will take anywhere from 4 to 8 months. The first season of the show ended on May 6, 2011 and the second season started on September 17, 2011. That's a little more than 4 months between the first two seasons. Season 2 ended on April 22, 2012 and season 3 started on November 10, 2012. That's a little less than 7 months. The reason I think we may have to wait until about 8 months is because in that time we will have reached October and October 10, 2010 was when the series first aired so I think maybe season 4 will mark the 3rd year anniversary of MLPFIM. If you want to know some interesting information about season 4 you can check out my article:
link.
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