[quote=@Spinosaurus]
<Snipped quote by Lmpkio>

I've heard that theory. Not sure if I believe it or not. Sounds plausible, though.
[/quote]

Plausible yes. Confirmed? Not yet. We need a second game filled with enough backstory to connect the dots and confirm Doom Marine's origins. 

Still can be used as a valuable character for a RP though lol