This is an interesting case: In 2005, a church trademarked "Add-A-Zero," which unashamedly prods church patrons to give more money to the church. In 2009, Adidas filed a trademark application for "adiZero" on sports clothing and shoes. The application was rejected due a likelihood of confusion between "Add-A-Zero" and "adiZero." The church is willing to give up the mark for $5,000, but apparently Adidas does not want to pay that much.
Adidas unsuccessfully petitioned to cancel the mark, but this does not seem like the type of case that will go to trial. Adidas might have to add another zero or two, but these parties should settle in the near future.