I've bought the game guide already and found these story revisons in it:
"Just like the rest of the game, the story evolved throughout pre-production. In the first version, as a bridge to Tomb Raider: Legend, we had Professor Peter Eddington in the story as a character. Rather than being the same age as Lara's father, we made him in his mid-thirities, and we gave him a niece, Jessica, whom he was caring for after the death of her parents. We also had an additional artifact, the Eye of Odin, which resembled an articulated metal snake that wraps around your neck and head and had various powers. We wanted this artifact to attack Jessica and posses her, and the problem of freeing the artifact from the girl would be part of Lara's journey, and what brings her to the Artic at the end.
We cut these elements from the story primarily because it was overly complicated, and we simplified the story by keeping the motivations attached to Natla's plan and the associated involvements of Amanda and Lara's Doppleganger. This also saved us the trouble of steering away from any misconceptions that Lara and Peter had a relationship, and also the burden of having a little girl character in the game not come off as annoying. This is possible, given the right voice actress, but it was a relief to make the story more concise and appropriate to the pace of the game.
Because these cuts were made in pre-production, we had already concepted both Peter Eddington and Jessica, and that's what you see here"
Eric Lindstrom, Creative Director.
I also scanned these pic's of the pages for you guys:
http://pnguzman.com/images/tomb01.jpg
http://pnguzman.com/images/tomb02.jpg