I would say that its possiable the trailer shows how the old Noble 6 died because, if you look Kat doesnt have her robotic arm, which she lost while trying to deliever a bomb. And they survived beacuse the ships shields contained the explosion.Thom did not survive. The rest was far away enough. It wasn't a large enough explosion to kill them. Also the Cruiser contained the explosion rather than just destroying everything.?He wasn't in Noble Team during "Deliver Hope"The Covenant ship's shields contained most of the initial blast, and MJOLNIR armour is hard-shielded against radiation.The shield of the ship works both ways. They contained the blast inside the shield.