Fandom Timeline
2002: Kingdom Hearts comes out
2004: Chain of Memories comes out
2006: Kingdom Hearts II comes out
2008: Re: Chain comes out (20 months after the Japan got it)
2009: 358/2 comes out
2009: Coded starts to come out in episodes
2010: Birth By Sleep comes out
2010: Coded’s last episode comes out
2011: Re:Coded comes out
2012: Dream Drop comes out
2012-2018: Khux and the remakes come out. Not gonna list them all cause it’d be a little much
2002-2006: Fanbase is small and not noteworthy but they are there
2006-2009: Kh II causes the fandom to explode in size. This was the most prolific but also the most cringy time period. Some people would call it the dark ages. Deviantart and Fanfiction.net galore.
2009-2012: We all grew up a little and became a little more self-aware. Stuff still went on but we were all a little more critical of it. Still very prolific. I guess by default this would be the fandom’s high point?
2012: Fandom slowly starts to die due to lack of releases outside of Hd remakes and Khux. No sign of Kh III.
Now: We’re still here just on and off dormant. We’re not small by any means but we’re not at 2006-2012 level prolific. There are inklings of questionable stuff floating around but that’s fairly normally. We’re finally getting Kingdom Hearts III. Hopefully that will boost the fandom output.