Possible Clues:

• Undecided, on schedule: Abbr
• Short "We'll announce this later"
• Not yet known: Abbr
• Undecided, on a schedule: Abbr
• Sked abbr
• "Still pending" letters
• Brief "Not sure yet"
• "I'll let you know": Abbr
• Not yet known, for short
• "Not certain yet," briefly