I've no idea if the rumours swirling around that Peter Capaldi is the new Doctor Who have any truth to them. Certainly last time round when the bookies got to the point of refusing new bets, it turned out they had settled on the right name (Matt Smith came out of nowhere after Paterson Joseph had been the long-term favourite). But it may be that the BBC have learned from that experience, and that Capaldi's name is being used as a decoy, or is just a spontaneous false rumour. My guess is that the production team might be (wrongly) concerned about choosing someone of Capaldi's age, if only because the audience have become accustomed to younger Doctors since the show's comeback in 2005.
But if by any chance Capaldi is the choice, my fervent hope is that he won't follow in David Tennant's footsteps by ditching his Scottish accent. If it's plausible for a Time Lord from Gallifrey to speak the Queen's English, or to use Christopher Eccleston's Lancashire accent, or even to have a semi-Scottish accent during his seventh incarnation, then there's no good reason why he shouldn't speak like Malcolm Tucker, albeit perhaps without the expletives. Tennant's decision to become the first Doctor in history to abandon his natural accent was the absolute epitome of the Scottish cringe. If this whole 'better together' thing (which it's assumed Tennant is a firm believer in) has any meaning at all, it ought to be about celebrating each other's differences, not about everyone in Britain aspiring to the 'normality' of being a good little Englishman.