Dream Scenario I came up with:
Furukawa-san comes to the end of the Direct and does the typical 'It's over...well yes, but actually no.' shtick but this time he says "We have one final reveal for you, and we have a special guest here to deliver it for you. Please take a look!"
It fades to black and fading in is Yosuke Matsuda. He comes in and says that he has an announcement for us. Square is hard at work making new games exclusively for Nintendo Switch, and while nothing is quite ready to show, he will tide us over with letting us know that FF7Remake is coming to Switch and Matsuda will recommend playing it on a Switch Pro (an upgraded version of the Switch announced very early in the Direct). Matsuda will then say "While most of the Switch-exclusive titles are not ready to be revealed, we do have one little teaser for you. Please enjoy!"
Fade to black.
When it fades back in it seems like a teaser for a generic JRPG and it's just kind of panning over different areas until it focuses on a villain whom we have never even seen before and he just succeeded in putting their evil scheme into motion. "Now no one can stop me, muahahaha!" and all that. Then it pans to the starry night sky.
"Huh, it seems the Kingdom couldn't last in peace forever, no matter how hard it's people wished for it." says apparently no one on screen, though a star in the sky does shine brighter than the rest.
Suddenly, this plays right as the line below shows up on screen, but it sounds more orchestral:
https://www.youtube.com/watch?v=Yuww-R_I_wU
"Looks like I'll have to take care of this! It's been a long time, I wonder if I've still got it!" this extra-shiny star then moves through out the sky until it's above seemingly a random town that has nothing about that makes it stand out, then it descends upon a house in the town, bringing with it a bright white light that eventually envelops the whole screen as the teaser fades to white as the song ends right at the end of of the 44 second mark/right at the beginning of the 45 second mark.
Then, one last line of text.
'I should probably enlist the help of my old friends too, just to be safe. After all, it was because of all of us we were able to save the world. I wonder how they are doing all these years later...'
Fade to black...
Fade to Nintendo logo, end of Direct.