MI6 a website dedicated to James Bond himself are reporting that Daniel Craig will be facing "someone extremely physically fit and over 6' 2", check out the apparent casting call here;
"Casting has begun for the main assassin, with the search
specifically focussed on someone extremely physically fit and over 6'
2". Whoever wins the role will have several altercations with Daniel
Craig's 007 throughout the film and also a driving sequence. Former
sports athletes will be under consideration along with anyone 'very
unusual'. The character has the working name of 'Hinx' (which may change
before shooting starts) and is said to be between 30 and 45 years
old... The goal is to find the next Jaws or Oddjob - a henchman so
different to anything that has gone before that they will become
instantly iconic in the film series,"