With players such as Pollard and Russell, West Indies should be the favorites for this year's T20 World Cup. Also, many of the West Indies players have good experience of playing in India, as they are participating in the IPL. They are the defensing champions as well, and therefore a lot of people expect them to perform well during this edition. However, as per the ICC T20 ranking, West Indies is ranked 9th.
In papers England and West Indies has the strongest team, West Indies has Carlos Brathwaite, Jason Holder, Sunil Narine, Pollard and Russel who can turn a match with their sole performance and England has Eoin Morgan, Bairstow, Jos Buttler, Ben Stokes and Jason Roy on his day will smash any bowlers.
The reason for West Indies in the lower side of rankings is that they never play with their best team due to multiple reasons and if they come together they will be a huge challenge for the rest of the teams.