The season is long and Leicester might lose some of its players, hopefully not. Giant clubs from different leagues are keeping their eyes.
Like the time when they won the league, this is one of the reasons most of the big clubs remain on top. Talented players want to play at the peak of world football in order to boost their careers, which is naturally a short one (ao we can forgive the self indulgence). We saw it happen to Monaco after they won the French league.
However Leicester are bouncing back from the loss of key players in the 2015/16 season. They look to be growing a team and not just a crop of players.