There is no word yet on what his role will be, but if 你 aren't familiar with Aziz, he's from MTV's sketch comedy show, Human Giant. This 文章 also states that it's unlikely anyone from The Office will be leaving the cast for the spinoff.
Spoiler TV 论坛 recently had a vote as to which new shows they would add and The Office got voted in! There are two sub-forums one for spoilers and one for no-spoliers just 显示 discussion