Okay, I think I need to repeat this to clarify because people are misinterpreting this.
VRPlant made a PREDICTION. This prediction is not geared towards a certain time, so it is likely not for the presentation tomorrow. This is also because they are higher-up in Nintendo, therefore they probably know the presentation front and back by now, or at least the gist of it. They can't 'predict' what they know. It is just that, a PREDICTION and LIKELY NOT for tomorrow's presentation.
It is NOT a leak. It is NOTHING certain. It is simply speculation on their part, and even though it is fascinating, considering who they are, it is nothing beyond that: a point of fascination.
The misinformation being thrown around already is nuts. I can see why VRPlant didn't want the prediction to get out necessarily. Oof.
ETA: When VRPlant leaks something, he LEAKS something in no uncertain terms. He isn't like Sabi's former NoA source who posts pictures of birds. If they say it's only a prediction, it is just that: a prediction.