Sorry, Wamdue, I was misremembering who I was discussing the very thing with in the "Deadly Assassin" thread; it was Diankra, who raised the same idea -- that the eighth Doctor fought and died in the Time War.
There's no reason to think that.
In reality, there are reasons to think that the Time War is entirely the ninth Doctor's baby. The "Flood Barriers" essay in The Flood gives some evidence that RTD saw the Time War as purely the ninth Doctor's struggle. He wanted a regeneration in the comics to clear the decks, but he didn't want the ninth Doctor comics to follow directly on from the end of the eighth Doctor's era because there was a lot of stuff in between.
As you write, "I'm also pretty sure that alot of fandom will agree with me on this," and yes, a lot of fandom will, if asked, agree that the eighth Doctor died in the Time War. But there's no evidence for it, except for a feeling that it must be thus, and feelings don't substitute for fact. Whereas for the other view, there's evidence of RTD's authorial intent. Admittedly, it's the only evidence that exists, but it is evidence.
As I wrote in that other thread, Larry Niven once said that "The writer reserves the right to have a better idea." There's no reason why a future producer, like Steven Moffat, would be beholden to RTD's ideas on the Time War. For all we know, Moffat could decide that it was Richard E. Grant's Doctor or Rowan Atkinson's Doctor or even Joanna Lumley's Doctor that fought the Time War. If there's a story to be told of the Time War, then it will be told.
In all honesty, I'd rather the story wasn't told. Because whatever is told is unlikely to match up with the paintings fans have painted in their minds, from the little hints and dribs we've had the past four years. Any story of the Time War is bound to disappoint.