Has Mark Henry now lost credibility when he actually wants to retire?

Probably a little bit, yeah. However, if he's a good guy when he really does hang em' up, I think the fans will be fine with it. Henry has lied and cheated many times before, and the audience (including myself) bought into him completely this time. I don't think it'll be a major issue. And, he may not even retire in that setting when he does opt to go. The vast majority of wrestlers just leave without a mention and are never heard from again beyond an obscure reference from one of the announcers. Or he might go like Batista did, with an angry tirade and a storming out.

I actually think they went the wrong way with that segment on Monday, good as it was. I thought the crowd, and Henry, were so emotional and passionate that it would have easily worked to have Cena offer him a last title shot in his final match, whether on RAW that night or at Money in the Bank. Clearly though, he isn't really going to retire and wants to keep going, so that wouldn't have worked I guess.

I remember a Wrestlemania or Summerslam years ago where HBK gave a retirement speech because (as he told it) he was injured and his doctors said to stop wrestling. Then the very next day on Raw, he changed his mind and said "I'm never retiring!" By the time he had his Career vs. Streak match with the Undertaker (and lost, and actually did retire), everyone seemed to have forgotten about the earlier speech. The speeches were about 3 or 4 years apart.

Judging from that, I think as long as he waits a couple years (and maybe becomes a face again) it won't make a huge difference.

Yea, but thats the speech he wouldve likely given if he really was retiring so he doesnt need to give a real speech when the time comes. He'll probably just stop being on, like Billy Gunn was in WWE more than 10 years and he just disappeared.

Who cares? Pro Wrestlers rarely formerly announce their retirement in public. They simply stop wrestling.

He should retire, he's to big to do anything. And i can't see the WWE scriptors making him do much the rest of his career.

He will just go to TNA hahahah