SPOILER......Can I revive all the original dark brotherhood members into the dawnstar sanctuary with console commands without anything bad happening?will it cause any problems you think?I thought it would be a cool idea.

You can resurrect them all, I don't think anything bad will happen to the code for your game. After the raid on the Falkreath Sanctuary, they don't have any part in the game anymore, so it shouldn't affect anything. The only three who have anything more to do with the game are Nazir, Babbette, and Cicero, but even then it's just for colorful dialogue, not anything important to the game.

But why would you want to bring them all back? The Werewolf Arnbjorn was a little [censored].

I brought them back they are just chillin eating my food now! Awesome!