A couple days ago we bought a Britax Preview stroller:
Snap the carseat in and it looks like the right image. Of course our carseat (the Britax Companion model is the one that works with this) was stolen.
I’ve already decided that if we have twins, I will “wear” one and have the other in the stroller, alternating between the two. I haven’t seen a single dual-stroller for newborns, only strollers meant for older babies. So one in stroller, one in a baby sling, is what I’ve figured out.