Just another nice added touch of flavor to the mix. I must admit that I am not a huge fan of scotch, prefer a nice whiskey myself, but have found through playing that it can add a nice background complementary flavor for certain styles. If you keep the percentage low enough it shouldn’t be dominant, but more in the background.
I do have to admit I am slightly biased in that Hair of the Dog’s Adam from the Wood was my first exposure to the style. That was the beer that got me interested in old ales to begin with.
I know they use a bit of peated malt with some munich, chocolate, and black patent so I’m just playing with ideas. I was just curious what the overall opinion was for the option. I am perfectly ok if no one else thinks it fits the bill we’re going for, I can always tweak mine slightly come brewday.
I was also thinking Marris Otter with a bit of crystal but I admit the Golden Promise idea could work out nicely.
I am more than likely going to be oaking this in some way shape or form as well. 

Rad
edit also, in terms of OG, I just brewed up NB’s Wootstout kit last month and it’s OG target is 1.109. I didn’t have time for a starter when I got around to brewing this (poor planning on my part, life gets in the way with 4 kids
) so I just used 2 packs of US-05 and mine finished out at 1.020. All that being said, a higher OG kit in that range shouldn’t be unreasonable for anyone interested in it, but in terms of mass appeal for NB, we may want to target a bit lower.