Sure, they didn't explicitly confirm or deny anything, but note how they worded it. It seems like they might have
something in the works - even if it's just an idea thrown around in a meeting.
"At this time we have made no official announcements regarding our next MMA release” sounds more promising/likely than "We cannot comment on anything regarding a new MMA game, but thank you for reaching out".
Also, they also say to stay tuned for news in the future, which could be just about all of their products, but in this context, it does seem like they're talking about an MMA game.