Alright. I'm in full monitor mode to the reactions to this trailer. Just wow... my mind was left reeling and I've seen it being posted in areas with fan presences big and small (which of course it would).

Current project for /go/ will be monitoring the fandom reaction to this.
Here is all places I'm keeping track of so far.
https://www.equestriadaily.com/2019/03/season-9-premiere-to-air-april-6th-on.html comments discussion of course
https://mlpforums.com/topic/183073-new-trailer-for-season-9/
http://www.roundstable.com/forums/viewtopic.php?f=16&t=1812
https://boards.plus4chan.org/co/t418814.html
https://8ch.net/pone/res/322857.html
https://www.ponychan.net/pony/res/36826866.html
https://derpibooru.org/pony/season-9-discussion-thread-warning-spoilers
Of course with places like /mlp/ it is being reacted to on several threads and there is still a few corners where I have seen smaller groups of the fandom that are active that I need to check. Not to mention the still active social media areas.