"But win the Super Bowl this year? The Broncos? Is that realistic?"

"New England has been installed as overwhelming 13-4 favorites to repeat as NFL champs, while Denver, which did win the Super Bowl less than 18 months ago, is projected by Las Vegas bookmakers as a team that will have a tough time winning more than half its games in 2017."

Mark let me educate you again!
I think most people realize that the Broncos defense is a top 5 defense at worst, especially when you consider that the Bronco added Peko and Zack Kerr and the best defensive linemen in the draft in DeMarcus Walker. 

Special teams is special again in terms of the kicking game with Mcmanus and Dixon and the return game with Carlos Henderson and Isaiah Mckenzie:
https://www.youtube.com/watch?v=w_IobKqx5Vw

The defense will limited the opponents offense to a lot of 3 and outs then you have McKenzie picking up massive return yards, that is already a massive upgrade over last year, by fixing 2/3 of the team.
(continue)