Group A of the 2017 Men's U-20 World Cup is billed as the Group of Death: Argentina, England, Guinea, and South Korea are each teams one could find reason to believe will go deep into the tournament, perhaps even find the momentum necessary to win it. But there is only room for a maximum of three of them in the knockout rounds, so the competition will lose at least one, perhaps two, solid sides after the group stage from Group A alone.
It's also reasonable to question the Group of Death moniker, since this is also a group of teams for which one can find cause to believe might be over-rated.