We knew it was probably a bit premature, and likely inaccurate, and as it turns out, we were right. The rumors we posted yesterday of a Samsung Galaxy S IV launch in March of next year have been refuted by Samsung themselves. Below is a Tweet from the official Korean account from Samsung (probably only useful to those who read Korean). Based upon the timeline of previous Galaxy S launches, more than likely we won't see the SGS4 that early anyway.
Most assuredly we will get some more accurate rumors sometime early next year. We'll keep you posted.
Source: S3Forums via Engadget