Rumors are kicking around that Danny Boyle is to be involved in a possible second sequel to 28 Days Later. When questioned if he was interested in returning to produce the film, He responded "Actually, I want to direct it".
Although Boyle didn't return for the first sequel, 28 Weeks Later, It seems he is much more interested in a third film. The film looks set to be based in Russia or at least that area of the world, according to Boyle.
These are simply rumors at the moment, the idea has been peddled around for the last 3 years, but it looks more and more likely that Boyle will be at the helm if it does come to light.