In 9 days we'll see reverse shitposting.
"B-b-b-b-but muh datamines!"
The demo didn't have everything. It may have all the megas. Possibly. Unlikely, but possibly. At the time they would have started cutting a copy of the game for the demo, they literally could not have been done programming the entire game. Otherwise we would have seen a much earlier release date.

TL;DR- shut up flygonfags, shut up anti-flygonfags, you're both cancerous. The game comes out in 9 days.