Ric Flair would have been kicked out of Evolution, which would drastically reduce the qualities of the stable. It's most likely that Randy Orton and Batista would have suffered as a result, Ric Flair's presence arguably did just as much as Triple H's for building up the two new megastars.
I think it's very possible that Batista would never have held a world title without Ric, Dave Batista was pretty old for a rookie wrestler, he's a year older than Triple H. If he didn't have that immense push with Triple H and Ric Flair behind him, chances are he wouldn't have made it to the top before his age started catching up with him.