Board Thread:General Discussion/@comment-1824272-20150508083925/@comment-25045164-20151205111105

You can check through here.

Airforce Delta is completely dead in there. On the other hand, Gradius is still active. It can be anything that decides the renewal. The most common one is that a company still wants to plan to do something with a trademark. Much like Ace Combat, Infinity is still kicking. So, they will renew "Ace Combat".

A news that will expose a game company's new product in making will be, like DRosencraft said, the one that reports a new trademark registration. This one pretty much has worked (for example, MGSV, a case in which a number of news portals have reported the filing of new trademark by Konami).