#3: Bluestar was original going to be named Moonstar.
#4: Scourge killing Tigerstar wasn't just a cold-blooded murder after Tigerstar turned on him. Scourge had actually joined Tigerstar so he could get his revenge for when Tigerpaw had attacked and scared Scourge (Known as Tiny at the time) when he was a young lost cat who wondered into ThunderClan. Scourge was the only cat who seemed to remember this (not even Tigerstar himself) and killing Tigerstar was his long awaited revenge.
