If Warwick attacks and his attack trigger is on the stack, can the trigger be stopped by Flight or Fright or Rebuke?

Ruling: Yes, Warwick's attack trigger can be stopped by Flight or Fright (or similar effects) if Warwick is removed before the trigger resolves. Rebuke cannot be used in response to the trigger because Rebuke is an action, not a reaction.

Sequence:

• Warwick attacks and his trigger goes on the stack
• Opponent can play Flight or Fright (or similar removal) in response
• If Warwick is no longer present when his trigger resolves, the game cannot determine "here" and the trigger fails

Nuances:

• Rebuke specifically cannot be used as a response to the trigger because it is an action, not a reaction
• Hidden Flight or Fright could be played in response to the trigger