I wonder if we'll see Cid's famous high-steppin' run? That would be funny seeing it in full HD like that. And more of the bike and truck for the group after leaving Midgar could work, just have them usable until you reach the swamp. It would make sense to have the road end there and thus present the need for a chocobo that could get through places the vehicles can't and outrun the Zolom. Which, now that I think about it, could be turned into its own minigame. You would have to outrun and outmaneuver the Zolom until you get out of the swamp or it'll overtake you and you have to fight it, maybe with an opportunity to escape after doing a set amount of damage rather than killing it, which could be made to be impossible at this point in the game, you would just keep hitting it enough to escape each time it caught up to you, and if it knocks everyone out it would be game over, not just starting back at the beginning of the swamp, thereby increasing the stakes. This approach would also, I think, add impact to the group's discovery of Sephiroth's handiwork at the entrance to the Mythril Mines—after finally escaping the swamp and the snake beast they couldn't even come close to actually killing, they find one dead and impaled on a tree like in the OG, thus illustrating Sephiroth's sheer strength through the fact that he was able to so utterly destroy a beast Cloud and the others could barely survive an encounter with at this point.