(SPOILERS) A quick question about The Battle of The Five Armies...

In the scene where the orc grabs Gandalf from the cage and is about to kill him, just before Galadriel turns up, was that Bolg? Like, the original Bolg? This one?

I mean we only see him for a split second, but IIRC it looked a lot like him. Could that have been Bolgs original fate before the third film was produced?