First of all, Mendes explained his decision to direct Bond 24 after initially balking when he realised that he'd started a "number of stories that were incomplete", adding "I cast a new M, I cast a new Moneypenny, I cast a new Q. I felt there was a second part of a two-part story... " He also mentions that hearing the first Skyfall audience's roar of happiness – the "orgy of nostalgia", as he puts it – when the Aston Martin DB5 was revealed helped persuade him.
Also making things easier was Bond HQ's willingness to be flexible. "[It helped] when [Eon] agreed to wait a little longer and not go immediately – not go with two movies [and instead] go with one, which I felt very strongly about."
He also mentions that Bond 24 will feel like the second part of Skyfall, although it will not have a direct narrative continuation. Scriptwriter John Logan (Hugo) has so far refused to comment on the two-part story idea now being disbanded, so it's fascinating to learn that Bond will now be back in individual – albeit connected – installments.
The full interview is well worth watching, but if you just want to hear more about Daniel Craig's super spy alter-ego, jump to around 17 minutes in.
Bond 24 is released in the UK on 23 October 2015 and in the US on 6 November 2015.