With the Royals leading the Blue Jays 3-1 in the ALCS and the Mets leading the Cubs 3-0 in the NLCS, it's highly likely that we will be looking at a Royals and Mets World Series. This match-up could be determined as early as today if the Royals and Mets both win.
The last time the Royals won the World Series was in 1985 against the Cardinals. They have been to the World Series two other times in 1980 and 2014, but did not win.
The last time the Mets won the World Series was in 1986. They also won the 1969 World Series, which was the inaugural season for the Royals. The Met were also part of the 1973 and 2000 World Series.