Here are my predictions.

E3 2015 - Gameplay/Story Trailer. Perhaps the reveal of a release window. Most likely it would be 2016 as the Osaka studio is productive. Final Fantasy XV will probably be released by then as well. I'm expecting a Fall 2015 - Spring 2016 release. Once a game has a playable and running (Episode Duscae) version, it's typically close to completion. I think Tabata said it was 65% complete?
TGS 2015 - Trailer reveals more about story.
D23 2015 - Live Gameplay Demo with another trailer revealing the release date. Uses a majority of the same footage from E3 and TGS.
E3 2016 - Gameplay Demo for the press to play. Another trailer revealing new gameplay and story details.
Kingdom Hearts III releases November/December 2016.

There's a wide window between D23 and E3. It seems too early for a release date to be revealed in November 2015 but too late at June for E3. What other events are between them? PAX is too western. Perhaps the Taipei Game Show or the PlayStation Experience?

Hopefully we get some more news since they've kept very little about it. Now I want your guys' opinion: Do you think there should be a KH 3D hd remix? For the other two games, they had multiple games in them whether it's a game itself or a cinematic. However, this would end up being a stand alone title since it's the latest installment. Now I believe that since it was on the 3DS, I don't think they could do it (don't quote me on that as I'm not 100% sure about that) like they couldn't re-master 358/2 days and re:Coded for that very reason. Suppose they could re-make it though. Would you guys buy it since it is a stand alone game? Or not? Now here's my opinion: If it was solely that, then no, I wouldn't buy it. However, if they added like a very short KH3 demo type thing after completing critical mode or something, then I believe it would make the most money out of all the remixes. Otherwise no, I wouldn't buy it since I am content with it on the 3DS. I want to hear your guys' opinions on that thought.

They did say though that they wanted to have all the games on one console. I'm not sure if they indicated PS3 in particular. I think they'll release the complete collection of Kingdom Hearts for the PS4 so the people who only owned an Xbox and an Xbox 360 before getting a PS4 can catch up. Plus, I think they can crank up the graphics a little more on PS4.

If they did release a complete collection on the PS4, I would hope they'd do what they've done for the upcoming FFX/X-2 PS4 remaster for the resolution. It's technically running at a resolution higher than 1080p. Neither of the HD Remixes have actually been 1080p at all, they run at 1440x810 and then are downscaled to 720p or stretched to 1080p. It's negligible when playing on most TVs but I've noticed it when pulling footage off my capture card. Still looks nice, but damn that would be a huge selling point for the collection.

I don't think it would be too difficult for dream eater interaction and reality shifts since there are shortcut commands. I believe they were L + R + Y/X/A for a dream eater ability and A + X for reality shift. (Haven't played in a long time so I don't remember exactly what it was). I always do the shortcut commands for them anyways, so it wouldn't really bother me. If you really want to touch the icons/play with them, on the PS4 you could do that with the touch pad. Tap left side is top dream eater, tap right side for bottom dream eater, and press the button for both of them. The only problem is that I don't know how they would implement changing dream eaters mid-battle, since you have a party of three but can only have two on the battlefield at one time.