Source: The Wrestling Observer Newsletter
As noted last night here on the website, WWE looks like it is teasing an Evolution vs. The Shield match for the Extreme Rules PPV. Word is that the match was in the works prior to WrestleMania 30. The reunion of Triple H, Batista and Randy Orton will likely be temporary, and is mostly being done to put over The Shield.
At this time, Ric Flair is not scheduled to get involved in the Evolution reunion.