John Cena did not 'botch' last night
There is a lot of talk going round that Cena 'botched' the German suplex last night at Night Of Champions. Having his shoulders on the mat was written into the storyline because WWE wanted CM Punk to retain the title, but not by beating Cena clean and potentially making him (Cena) look weak. The finish catered to both of these aspects and gives more scope for a continuation of the feud at the Hell In A Cell PPV.
Hopefully this clears things up.