Complex sentence: The 2007 season was the final season of the series under Anheuser-Busch's sponsorship, as it will be known as the NASCAR Nationwide Series sponsored by auto insurance company Nationwide Insurance with a $70 million contract for 7 years.
Split into simpler sentences: The 2007 season was the final season of the series under Anheuser-Busch's sponsorship. In 2008 the Busch Seris becomes the NASCAR Nationwide Series sponsored by insurance company Nationwide Insurance with a $70 million dollar contract for 7 years.