My goodness. I have always liked to look through the opposing teams forums before a game. I have been doing it for years now. I have to say that the 49ers have some of the loudest most angry homer fans I have ever witnessed.

I fully expect this comment to be picked up for fuel for their barn fire of loathing.
From what I can see they expect the follow to happen:
We wont be able to contain Kap; Zimmer will have no game plan for him. We have no athletes on defense capable of containing him (to be fair the only two I would pick to compete with him in that category would be Barr and Smith) and we wont be able to get pressure with our D line.
They appear have a modicum of respect for our secondary... which is shocking to read as a vikings fan
They expect a multiple turn over game from Bridgewater and the only WRs they mention are Patterson and Wallace. Which seems odd, I kinda thought the NFL had an eye on Johnson after last season but maybe that's juts the NFCN? They also never mention or talk about Jarius Wright.
They expect Bowden to absolutely dominate Peterson and Peterson to have lost a step and have rust to shake off (possibly fair concerns).
They expect to get pressure on Bridgewater all game from their Dline. (to be fair I know only a little about the 'Niners offense but next to nothing about their D ((All the ones I know have retired early or left

) so its possible they could with our questionable Oline).
Personally I expect this to be a wider score margin but the actual game being closer on the field then the score would indicate and for once my Downer Viking spirit seems to think that it is the 'Niner's fans in for a rude awakening.
I think Bridgewater will come out and be efficient. He seems to be modeling his play after Manning, trying to beat the opposing teams defensive in film study, and having some success. Obviously this year will be the biggest test of it so far but from what I have seen I expect that he will succeed to some degree rather than fail. I'll expect 1 interception out of him and 1 TD but a solid amount of receiving yards, I'll say 220ish. Most of those I think will be YAC from Wright and Johnson with Bridgewater hitting them in stride with space. I don't expect Wallace to have much of an impact beyond drawing attention away from those two at first.
I think our Defense will not dominate Kap and Co. but will do a better job containing them then most imagine. Barr should be a force on Blitz packages and he has the speed to help cover the lower middle of the field if needed. Which will be a nice change since that has typically been a giant weak spot for us (TE crossing routes are the bane of my existence

) All that said I expect Kap to break contain and extend some drives with his legs but nothing back breaking.
I think the biggest impact will be with Peterson. I think he will be pushing hard this game more than any other. It'll lead to some TFL but I think more than lose a step in game it'll be more his long term stamina that will be impacted by the year off and age. I expect his lines to look something like
5 yds, -2 yds, -1yds, 4yds, 13yds, -3yds, 9yds, 3yds, 2yds and then slowly climb from there.
More importantly I think the 'Niner's Defense will be much weaker than most imagine in the middle. Their LB core is much depleted yes they could have good replacements but you don't lose Willis and Borland (it was early but he had a great rookie season) and come back as strong. I think their LB core will be their weakest area despite having probably their biggest playmaker on D. Yes Bowman is a great player but he cant be everywhere every play. I am sure he will be all over the field to start but eventually he will get gased, everyone does. With some misdirection, pitches, screens, etc. It wouldn't be too hard to remove Bowman from the attack point on quite a few plays. I expect him to be the guy in the box that the Vikings game plan to take out of the plays.
Overall I expect a quick agile Vikings Offense and and solid Defense that is more aggressive then we are used to up here but also doesn't give up the back breaker (like we are also used to).
I think it'll be something like 27-14 Vikings, but like I said the game play itself would indicate a much closer score.