Complex sentence: During the 2005 World Series, a new white banner was introduced, resembling a chrome finish, and the team abbreviations became white letters in the team's main color; the next couple of years, the new banner was adopted for all games.
Split into simpler sentences: During the 2005 World Series, a new white banner was introduced. This would resemble a chrome finish, and the team abbreviations became white letters in the team's main color; the next few years, the new banner was adopted for all games.