Is there stackexchange form for discussing upcoming games? This would be useful for those who need help investigating ahead of time of a game is worth the anticipation or not.
Nope, there is not. StackExchange is not a forum, I'm afraid. It's about Q&A. If talking about unreleased games was on-topic anywhere, it would be here. We've determined it's not, because Arqade is not a news site. We're about answering questions about games that can (or were able to) be played.
If you're looking for a place to discuss upcoming games, I'm afraid SE isn't the place. You can come hang out with us in the Bridge, but there's no guarantee that you'll find what you're looking for.