Marisa Tomei , Kelly Macdonald and David Harewood are set to star in the second season of upcoming HBO / Sky legal drama “War.” Season 1, which features Dominic West and Sienna Miller as a high net worth divorcing couple, wrapped in February and is set to launch later this year. Season 2, which will focus on an explosive defamation case, is about to go into production. Joining Tomei, Macdonald and Harewood are Claire Skinner, Omari Douglas, Kadiff Kirwan, Douglas Booth, Charles Edwards, Luca Pasqualino, Rebecca Front, Alexandra Maria Lara, Linus Roache, Violet Braeckman, Sasha Behar, Sid Phoenix, Cornelius Booth and Megan Channell. The show, created by “Hijack” and “Lupin” co-creator George Kay, centers on two warring law firms in London as they go head to head on a series of headline-grabbing cases.…