Snagged the press release Images from here:
Square Enix Press Center - KINGDOM HEARTS III
Square Enix Press Center - KINGDOM HEARTS: UNCHAINED Ç
The trailer is of course available from there as well. If you haven't downloaded and watched the full HD version, DO THAT RIGHT NOW.
I was bowled over all over again after watching it again without any youtube compression
Here's the Imgur album with KH UX screens as well: Kingdom Hearts E3 2015 - Album on Imgur