you look at the history of the SB and there are many one time winners who just put it all together at the right time. When Peyton won his ring he pretty much was at best mediocre the entire playoffs but late in the season his D was healthy (Bob Sanders for probably about the only time in his career late in the season) and his running game - Addai mainly- played very well when it mattered.
Look at the Raiders when Plunkett was with them- their skill position players were mostly guys who had career years or great stretches when it mattered when they won their two. While when they had Stabler, Biletnikoff , Branch and Casper and the rest of the cast in the 70' they only won ONE.
This, you hit is on the head for winning a SB, a team has to play well in the playoffs, for those few games.
Dallas last year had a strong finish to season , scoring a lot of points, and defense doing good, then in playoffs they did not look so good,
and they made key mistakes and bad plays instead of good ones.
look at the year packers went 15-1, then one and done in playoffs.
you have to be able to turn it up when you get into the playoffs.
I think Cowboys will try to run same offense as last year, only without murray and teams are more ready to defend it, so It might not work
as well as it did last year.
At same time our defense should be better , they should have a pass rush now.
This year they have to play the AFC East , which I think they may go 2-2 there , and last year they got 4 wins from AFC south.
Dallas should get 10 or more wins and make playoffs.
Now @ the op, dallas does have a history of flopping when it looks like they have a potential SB team. but they usually flop in the playoffs.
2006,2007,2009 were such years. however last year was not looked at as a SB year , very low expectations, and they still flopped in playoffs.
A Romo /Garrett team-offense has never made it past div. round in playoffs,so can they get past div. round this year?
I dont know but I kinda doubt it.
Might depend on who they play and where.
Should be a fun season though.