I don't think it's a blemish. Did you see how Undertaker looked tonight? Can you imagine that guy beating Brock under any circumstances? Taker looked old, fragile, and out right bad. His body can't do it anymore. Beating someone like Brock not only makes Brock look bad, but makes wrestling in general look bad. Although I really think he should have hung it up at WM28. The whole story of the match and angle seemed to be the perfect time for him to retire. It's right in the fucking name. END OF AN ERA. 20-0. The end with HBK, HHH, and Taker hugging at the top of the ramp. That seemed like a pretty perfect time to be the goodbye moment. Punk/Taker was good, but that angle would have been AWFUL if Paul Bearer hadn't died. It was a complete after thought. 28 was the perfect ending to his career.
I said it earlier in the thread, but seeing Taker tonight was like watching Hogan and Flair wrestling in TNA, except a ton of people saw it. I really think continuing after 28 tarnished Taker's legacy. And tonight really cemented that.