Actually I interpreted the Brit's post-fight comments to say that Tyson can still hit very hard and is not to be taken for granted - but that he can be beaten now. The Brit had carefully studied and planned how to beat Tyson - the way he won may or may not have been lucky, but the Brit even post-fight thought Tyson could be dangerous.

Various promoter's post-fight comments makes it seem likely this is it for Tyson. Even if he does get in condition to fight again getting a meaningful purse may be hard (or so the promoter said, whatever credibility that has).