Complex sentence: Maisel and Arad then clashed over how many movies and what characters to feature with Arad leaving in May 2006 as Maisel received Perlmutter's support.
Split into simpler sentences: Maisel and Arad then clashed over how many movies and what characters to feature with Arad. Arad left in May 2006 as Maisel received Perlmutter's support.