The 21st Major League Soccer season kicks off on Sunday, and with it another battle for MLS Cup.
What are the top storylines from a team and player perspective heading into the 2016 season? Who was the biggest offseason acquisition? Which marquee player has the most to prove? Which team could be a surprise contender? And which club will win MLS Cup?
We assembled a panel of three ESPN FC analysts -- ESPN Insiders Kasey Keller and Alejandro Moreno along with Paul Carr from ESPN Stats & Information -- to weigh in on these questions and more ahead of the 2016 MLS season.