ROMSCOOOOOOOOUT!
Hey, for all we know, IGA has been working on this game this whole time...faking the "I can't continue with my dream" thing or at least downplaying it, and it's already half a year into production.
Regardless...I think if we were told "Hey, we're attempting to make this as big or bigger than SoTN." and given regular updates on the game's progression with little peaks at how it's coming along....I think I speak for a lot of us when I say I'd be more than happy to wait 2 years, especially if there was a fair amount of replay value worked into it. (and I'm not talking DLC...I can wait for a full game)
He did say in the video that they often had as little as 2 programmers and 4 artists while working on SotN. If he gets enough money they can hire a bunch of people to crank out the same quality in a smaller amount of time.
Though I will say, from personal experience, the longer length of time they took also would have likely helped the game reach it's refined state. Even when you're not working at a high pace, just having to work on something for a long period of time really allows you to think about it more. The more you think about it, the more you will discover and realize good changes to make or details to add.
I think, however, that we can expect something on the level of SotN even if this was not the case. IGA has a lot of experience now and without Konami holding him back with piss poor budgets, time constraints, and marketing blunders, he should be more than capable of cutting loose and giving us a really polished experience.