That's basically what the linked article says, the first two paragraphs:
EXCLUSIVE: After landing the villain role in Ryan Coogler‘s next project, Jack O’Connell continues to fill out his dance card. Sources tell Deadline that he is set to join the cast of 28 Years Later, a sequel to 2002’s 28 Days Later. Jodie Comer, Aaron Taylor-Johnson and Ralph Fiennes also star in the pic, which is part of a planned trilogy.
Danny Boyle is directing the first movie from a script by Alex Garland. Sony will release the film in theaters globally.