My suspicions were correct! The commander Raynor skin in HotS was indeed a reference to the new hero.
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I really hope they write more lore strings to hype up new heroes and videos on their backstories!
As for Jack, yeah, it's a rather cliche story, but it's a good one. Not kidding; after reading the IC news clip about him, connecting the dots and then watching his origin story video, I actually shed a tear. Good cliche stories can still be good. Like Dragonlance!
I wonder, what was Reyes really up to? Seems like he's going to be Morrison's counterpart. Why did he hate Morrison? Was it jealously? An internal ideological war? And who tried to destroy OW? Why?