Step by step guide of my KH3 reaction:
1) Super happy that rumors of Versus changing to FFXV were true. Think the most exciting reveal of E3 is now over.
2) Nomura says "one more trailer." I instantly think "Probably gonna be that leaked 1.5 trailer."
3) Disney logo pops up. I smile. Still thinking 1.5.
4) Begins with KH1 and CoM. I'm like "Yep, 1.5. Cool."
5) Then KH2 shows up. "Wait, what?"
6) Then Days. "Is this 1.5 or isn't it?"
7) BBS and Re:coded "OMFG, is this 2.5!?!?!?"
8) DDD. "Okay... will someone explain what on earth is going on?"
9) Cutscene of Sora on Destiny Islands picking up Master Keeper. The significance of the keyblade being Master Keeper does not occur to me due to my confusion as to what the hell I'm watching. For a brief moment, I actually wonder if this is Kingdom Hearts
X despite that not making any logical sense, because I can't possibly think of what else it could be.
10) I see Sora in his KH2 outfit. "Maybe this is 2.5 after all? Doesn't really make sense though."
11) Screen turns to black and "Kingdom Hearts III" logo manifests on screen. Still being entirely confused about what preceded this, the gravity of seeing the words KINGDOM HEARTS ****ING 3 does not completely register because I was not expecting it AT ALL. Therefore, my only reaction is: "........ wait... WHAAAAAAAAAAAAAAAAAAAAT!?!?!?!?!?!?!?!?"
12) As gameplay footage is playing, my mind catches up with itself. Everything then makes sense as I realize what I'm watching. I watch the entirety of the gameplay in complete stunned silence, mouth agape, eyes wide in shock.
13) "Now in Development". I scream in pure shock and happiness, pause the E3 stream, and procede to skip merrily around my house exactly seven times sharing the news with everyone in my family, who are laughing their asses off at my excited screams.
It was a good E3