The player in juventus that is on the final champions league last time is not the same as player now anymore. Many of their player has left juventus and now they only has pogba left for the midfield so this time it will be very different and they may not until final again
Look at the history books, in modern football no team has won the CL two years in a row. Of course Juventus might not make the final again but you can say that about Barcelona too.
Honestly I'm not bull shitting, it is a different team winning it literally every season, there are so many good teams, it's competitive.
http://www.topendsports.com/sport/soccer/list-league-uefa.htm
^^
No team has retained the trophy since AC Milan in the 88-89 & 89-90 seasons.