@evnted gave a great response here, but I'm going to add my own opinion.
If Helenius, Buium and Dickinson are
all gone with the Devils drafting at #10, I truly feel there will be a strong chance that Fitzgerald and the NJ brass would strongly consider Brandsegg-Nygard at #10 overall.
Fitzgerald has already shown he doesn't much care about the consensus rankings (see: Mukhamadullin, Nemec). He's willing to identify the guy he wants and take him.
The big argument here is actually downright silly -- "the Devils would take Catton over Brandsegg-Nygard because they need a center". I mean, if two regular joes like myself and
@Guadana can see with relative ease that Brandsegg-Nygard is more likely to play center in the NHL than Catton, I'm sure it's also come up in the Devils' scouting meetings. Just because Catton is listed in mock drafts at C and Brandsegg-Nygard at RW doesn't exactly set things in stone.
So the answer to your question is that -- in your scenario -- I would hope the Devils would draft Brandsegg-Nygard at #10, and it would also feel to me as absolutely a real possibility.
My #2 choice in this scenario still would not be Iginla or Catton or Eiserman -- it would be either Chernyshov or Hage. It might sound weird to some people, but I have all 5 of these players ranked fairly similarly. Also, I truly feel the Devils need to start concentrating again on building team speed. Hage is easily the best skater of these 5, and Chernyshov is easily second. Although Eiserman clearly has the most offensive upside of the 5, he also has the weakest overall game. Although Catton has the second-most offensive upside, he is the smallest and probably at the bottom of the list if you're just ranking the skating skills.
I
really really like Iginla so he would be tough to pass on for me. I'd also be happy if we drafted him. But for the Devils, I think Brandsegg-Nygard would be the best pick here. He's a power forward who is also a high-end skater, he has a bomb of a shot and an elite combo of hockey IQ/compete level, he is the best defensive winger in the entire draft and could project to center. It just makes sense.