Simplify the following text for a Grade 8 native English-speaking person.
Original: Those teams which have never made it in franchise history are listed by the season that they entered the league , either as a new franchise or when they merged into the NHL from the defunct WHA league .
Simplified: Those teams which have never made it in team history are listed by the season that they entered the league , either as a new team or when they merged into the NHL from the WHA .