This kinda reminds me of when Toyota released the full size tundra in 2007. Big trucks were not their bread and butter. So they didn't need to build one. Just like kawi doesn't need to build a sport sidexside. But, like the krx, the tundra was a stronger, better built truck than anything else on the market and it took the other manufacturers years to even bother trying to compete. Mostly because they had brand loyalty from their customers and could get away with selling them junk for a few more years.
Point is, people did the same thing, as soon as the tundra was released, people started asking and speculating about a 3/4 ton, a megacab long bed, a diesel, etc.
And none of that ever happened. Because the truck still isn't their bread and butter, so they don't invest what ford does into their trucks or advertising because ford sells 4x as many trucks and probably always will.
I'm guessing it it the same scenario with Polaris.
Even if kawi builds a 4 seater, I don't think they will steal enough Polaris and canam customers to justify building one, even though a few people said that if they build one, they'd jump ship. I think it will take a few years and seeing how the krx does before they even consider expanding into a krx "line", from a single unit.
Just my opinion.
But it's fun to speculate and wonder and do photoshops of what it would look like. I do it too.