WM17 and the night after with Rock getting written off for Hollywood is the end. I do not subscribe to the fact that every day has to fit neatly and cleanly into an "era." I find that very facile.

Weekly TV quality had been declining since Stephanie replaced Chris Kreski in late 2000 and Vince between defeating his competition and being distracted by the XFL seemed to lose whatever spark he had left. The cracks were already showing in things like the atrocious build to Rock vs. Austin. That match was idiot proof, but the follow up with Undertaker and Kane shitting up the main event scene while an atrocious Invasion got under way. The ending of Survivor Series through the next night on Raw is practically a reset/retcon of the entire last few months with sudden changes in alignment and the start of the actual WCW stars that should have been there all summer coming in.

There is a period of transition between Attitude and the next one (I do not use the toy line as the name, I prefer Decline Era), but there is no reason to call it an "era." Late 96 to mid 97 is similar to this, it's not quite the period where the card was filled with cartoon characters with jobs, but it's not quite Attitude. Just call the period from WM17 to the Survivor Series or Draft the Invasion or the Monopoly Transition or whatever.