Others hopefully reaching for the helicopters, only to be filled with holes.
He shows mercy instead, even against better judgments.
He has the memories and experiences of Big Boss, but how he responds is dramatically different.
After, we clearly see the Outer Haven logo in the background again, as you pointed out.
That was the plan all along.
The Phantoms of Venom Snake: The Boss Venom Snake shares the memories and experiences of Big Boss.