I also would not rule out the possibility. There's this trailer line-up mentioned in the schedule and there's also the Sony conference.
Let's not forget that most of these panels are around 15-45 minutes long. While KH3 is likely more developed than it was 2 years ago, I doubt they will have a panel exclusively about it at this point. At least none that exceeds the length of a few minutes.
Additionally, most of the games featured here are games which have either been released or will release soon. Basically, games which are at a more presentable state and need more marketing or could use to have more background info since their release.
I'm not saying there will absolutely be something regarding KH3 at E3, but panels are what they are. Mostly talking while showing off the games. And KH3 is not anywhere near having such a panel when the interviews have always been so cryptic up until now. You have to be able to fill at least 15 minutes in such a panel, which I cannot see when that amounts to everything that we have seen since 2013.
But it can still have a regular trailer, just like FFVIIR could have one.
Edited by Merilly, 07 June 2017 - 04:38 PM.