I saw this poster, and found out from Yoko(The Chinese streaming site that is officially releasing the MLP episodes, said that new episodes will resume on August 2nd, they held off on releasing 21 and 22 because they wanted non VIP members to catch up, and that the series finale will air on that site on August 16.) And it turns out that both Invader Zim: Enter The Florpus and the MLP Series finale will air on the same day!
 
Invader Zim: Enter The Florpus is 1 hour 11 minutes long(Will premier on Netflix)  
MLP series finale is most likely 1 hour long. (Will premier on Youku)
 
 
While I’m going to miss MLP: FIM, I’m happy that both it and Invader Zim are getting proper series finales.