For me either the leak is fake or it is real. There is no "Square-Enix was using Erdrick as Leak Bait" because, beyond Japan's DQ love, with Roto/Luminary now being constantly in the mouth of Japanese fans, there is also corporate politics, leak baiting DQ is slapping the Enix fans in the face in particular. I could see it maybe happening with Chrono, who I find an unlikely pick, Geno, who has his chances, but Sora would be risky and Sephirot (Or any FF character being hidden by a DQ bait) would be a massive faux pas to the point it wouldn't be possible for anyone to greenlit such actions.
That said, what do you people think about the 4chan post that got the release date of Super Mario Maker 2 right? The leak basically saying Direct at day 11 with no new character until E3, where we get two. Personally, I think it was just a coincidence, but I fear I am biased since it hits Erdrick's chances as I don't think they would reveal him is something as western focused as E3.
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The only thing I liked in the Sony Direct was low-poly crash. It was quite abysmal.