He's practicing now... so if it is a setback, it isn't a big setback?
If he had a set back, he wouldn't be skating at all. There is not small setback or big setback. If a player has a setback, he won't be skating.
IMO what this all means is that the coaching staff decided D Sedin isn't ready for game 1 and decided to have the starting lines for game 1 practicing together...which isn't Daniel. I don't find this a big suprise anyways, he missed 9 games and has only practice once since. there is no way he is 100 percent.
We should all just be happy he skated today. Expecting a game 1 from daniel was having very high expectations