Well you keep doing games that came out somewhat recent or is not out in all regions, I would suggest only doing games that came out 6 months before the thread so Sept and before.
I expected Xenoblade Chronicles to have a smaller turnout (and I mentioned it in the OP for that one that I'd consider doing a post-NA release thread for it too. It actually passed my expectations for a turnout) but this was a pretty widely hyped and anticipated title and is from a genre that is typically very frontloaded. It's been out since the end of October so it's been out there for ~ 4 months now, has sold upwards of 10 million copies, and it isn't exactly the longest campaign in the world. My only guess for a lackluster turnout is people don't come here to discuss games much anymore.