Why would Sony want to spend time on something that was at the Microsoft conference when they probably have a ton of offers to take the spot? I can't think of any instance where a major game was at both in the modern cycle of E3. I could be completely wrong though.
I was just thinking about a short trailer not an other live demo
But I don't know, FFXV will also have its own active time event.
The biggest surprise for me would be a new FF7 trailer.
We already know that there won't be a KH3 trailer.