As previously reported, Dave Meltzer indicated in the Wrestling Observer Newsletter that Vince McMahon likely moved up the date for Dr. Maroon to re-evaluate Daniel Bryan. After the meeting concluded and cleared Bryan, he was said to have “tears in his eyes” and word began spreading backstage at RAW that he was likely returning.
When WWE made the announcement on Tuesday Afternoon after everything was finalized, it was because the company wanted to capitalize on the news and generate a big rating for SmackDown. The belief is that the announcement had nothing to do with WWE wanting to break the news first or get it out before the rest of the internet did.