Lauda has quashed the rumours that Vettel will replace Hamilton despite what happened in Hungary
- clearly all the speculation which seems to have come from the German media is an attempt to destabilise Hamilton and try get the "real" German driver into the the German team
http://www1.skysports.com/f1/news/24181/9401833?
As for joining Mclaren - unless he is prepared to accept that he may not have a winning car then why would he want to do it plus his teammate could be Kevin Magnussen or Vandorn so he is up against guys from the Mclaren development programme who would show no fear
or he could have Alonso as his teammate which I am sure is going to create fireworks