Isn't it kind of simple, yes RVD and Jeff Hardy are big names, yes people loved them in WWE were they grew and became fan favorites ( RVD more so in ECW as well ) and yes it was the return of Sting, but the casual fan who doesn't go on sites like this don't know that Jeff Hardy and RVD had signed on, and to be honest, I'm not bashing TNA, I like what they're doing, but if I had a choice to Hogan-Abyss vs Flair-Styles or Cena vs McMahon and Company 2 weeks before the biggest night in Wrestling period, I'm going with WWE, I think Flair should be retired but thats a another story, and Hulk is just... Well hes Hulk..
Honestly I don't look to much into the ratings for this week, but next week is when it'll get interesting, all the people now know that Jeff Hardy and Rob Van Dam are in TNA now, so it'll be interesting to see if more people watch to see them now that they know they're there, however I don't think Hardy and RVD, although the two biggest Free-Agents, can convert enough people to really take away WWE's fans.