Original sentence: In 2002, Showtime 2 was renamed Showtime Too (a minor pun on its previous name), and Showtime 3 became Showtime Showcase (also known and sometimes referred to simply as "Showcase")
Edited sentence: A year earlier, Showtime 3 became Showtime Showcase (also known and sometimes referred to simply as "Showcase").In 2002, Showtime 2 was renamed Showtime Too (a minor pun on its previous name)