lol, I'm the exact opposite of you lol, I'm Snow/Serah and I actually don't see that ship ever sinking. I dunno.
I think it'll explore Snow's issues and problems for doing the same shit he did in XIII and putting himself in danger. Although imo, I think "Don't Fight For Me" is less for Serah than Vanille and Fang- he's doing it for Serah yes, but Lightning, Vanille, and Fang are all important people to him. He goes out searching for Lightning, and because he believes in Serah he believes Lightning is alive- and seeing as how they interacted in the first game it would make sense he would go to find her. Also Fang and Vanille because Fang actually says she doesn't want Snow fighting for her.
I don't think Snow/Serah is suppose to eclipse other relationships so even if that's the couple I support, I hope it's also about his relationship with other characters.
But even with my Snow/Serah rant, oh god I hope this doesn't kick up the war and S/S wangst again. I feel like all the fans are finally get sick of nitpicking at each others fans and it's finally dying down.
But I'm really happy he's getting his own episode. His story does seem interesting and if he's also going through time and working to save the world, I want to see what he's doing. We know what's going on with Sazh, even if it doesn't explain everything, and Hope. I just hope it isn't annoying, I like Snow much better in XIII-2, but if I have to play as Snow XIII HEROHEROHERO it's going to bug me.