I fully expect to see it.
They recently "leaked" an image of FF7:R for no particular reason.
And their countdown E3 site also looks like it has the Buster Sword texture in the background.
It's happening. And this time they will show Tifa.
This coupled with some other things like the job postings for ramping up game development (yes this means that a game's release is could actually be closer when more job postings happen rather than the other way around if all the parts are in place) give us a high probability to see the Remake either at SE's or Sony's conference.
If we don't see it at SE's, don't panic just yet. It would make more sense actually for it to be shown at Sony's considering Sony's is a live conference, SE needs to hype the bejeesus out of the game, and the FF7 remake has been shown at two previous Sony conferences as a timed exclusive.
If the game isn't shown off at all it would be worrying, but let's wait and hear if any news starts circulating which I'm sure it would from SE about the remake's possibility to show up later in the year.