Neal Purvis and Robert Wade have been the early writers on the James Bond film series since 1999's "The World is Not Enough," the pair often doing the initial drafts with other writers like Paul Haggis and John Logan coming in to polish.
It seemed as if the pair were set to retire from the series after handing in their early drafts of "Skyfall," with Logan subsequently taking over the later drafts and was set to handle the upcoming twenty-fourth Bond film solo.
That changed this week. Logan has been working for several months on the script for "Bond 24," and now The Daily Mail reports that Purvis and Wade have been brought in to polish his work. Specifically the duo are being brought back in to "punch up the jokes and add more insight into the past world of James Bond, giving the film a touch of history".
The project was originally slated to start filming this Fall (October/November) but filming has been pushed back to December. Their source says:
"Let's call it polite turmoil. People are getting on with their work, but we have to wait for the script, so filming won't begin till December, a few months later than they wanted."
At present there are no plans to change the November 2015 release date.