That's nothing new, many game publishers have done similar thing.
A trailer for a release date trailer or gameplay trailer.
Announcement (Nintendo Direct trailer) for announcement (Nintendo Direct).
Yeah, but Nintendo Direct keeps it... well, direct. It doesn't hype the games up as a marketing campaign or the likes, just showcase upcoming games as they are.
I'd say Mega CD version since it's a port from Mega Drive's version with better music (which Michael Jackson loves).

Ah, OK. I was going to play it on Kega Fusion, but found out there were two versions and didn't know which is the better.
However, the ones I downloaded from
romsfun.com didn't work because they were CHD format, so I found another site called
Vimm's Lair, which had some roms in the "
vault".
I downloaded
Ecco,
Tides of Time and
Golden Axe Warrior.
But what's strange is, the control scheme of GAW seem a bit messed up. ↑ is left, ↓ is right, → is down, ← is up. B is attack, X is pause, Y is menu. However, keyboard arrow keys work fine, despite the emulator set to my Sega Saturn Pro Controller.
I figured, maybe Kega Fusion isn't made for the Pro Controller, but when I tried it with Ecco, the controller seem to work fine.