It is really hard to find out the real date for the season to launch ( I still think June 24th is real), but let us pretend it is the 24th. I have an idea about that thing, look at Total Drama World Tour for example. The Celeberity Manhunt launched in April 6th 2010, and it was some sort of indroduction of Total Drama World Tour. But the real season started at June 21st, so this could be some sort of indroduction. And I find it hard to believe that the cast would join again whitout some trouble.