Possible Clues:

• Imminent in a menacing way
• Imminent
• Hovering ominously
• On the horizon
• The __, Lawrence Wright's Pulitzer winning book on events leading to the 11 September 2001 attacks
• Appearing (as a threat)
• Hovering as something dark or threatening
• Appearing indistinctly
• Menacing bishop leaves in fine fettle
• Expensive porcelain on toilet appearing over the top