I've never been so sure of anything in my life. It's a nice tricky shot to make people have the exact same initial reaction that I had, you can tell how the stripes sit, if you have an authentic MLS jersey from the past few years, the sleeve stripes are kinda silky-ish (? dont know how to describe them). What's one thing we know every kit released league wide on 12/3 will have? 3 stripes on the sleeve.
The red and white stripes comprise the collar. The will be a New England "tree" flag on the back. There will be a motto somewhere, likely on the inside of the collar, something along "New England 'til I die."
Perhaps the jersey will be quartered (half of front red, other half blue, same on back) in honor of the infamous quartering act of 1774. I'd say it's probable, in fact.
I think you've got the shoulders reversed - the first image looks to me like it's white adidas stripes on red, rather than red on white.
You can play with the designs on the adidas miadidas web site: http://www.miteam.com/Customize.act...BALL&pmodelDisplayMenu=mi Soccer Match Kit 1#
Could be an asymmetrical design, but, I doubt that they would be so " revolutionary" Swatch 1 -red shoulder sleeve with three white adidas stripes on right arm or across the top of the shoulder  swatch 2 -navy body with white adidas logo front & center. Notice the hint of red from the right insert panel on bottom left of the image?  swatch 3 - The American flag is placed on the left sleeve of MLS shirts. The left sleeve could have a white shoulder with a red insert. Notice the navy stitching on the far left of the image? That could be the navy body of the shirt  Or, there could be white "shoulder pads" with red continuing down and around to the end of the sleeve.
Can't have a white shoulder. Adidas doesn't do multi-color stripes. Branding mandates that they use one color for the stripes on a contrasting background. So you can't have white stripes on white background.
Take last year's shirt using navy as the base body color Add in red across the top with contrasting white stripes, change the grey shoulder pads to white with no stripes in this section, continue the red to the bottom of the sleeve and add the white stripes to the end of the shirt. A variation that draws from the old Umbro kits with the red side panels.