THQ will reveal an unannounced game at Gamescom in Germany in August.
Core games boss Danny Bilson described the announcement as "big" to Eurogamer.
"I promise a big announcement at Gamescom," he said. "It's unannounced, a new announcement."
While Bilson refused to reveal any details on the mystery game, he did offer a clue.
"I can say that crowd, those hundreds of thousands of people, in that space at that time, this one's built to announce at that place. I'll say that. That's my clue."