I'd argue that if the UP is still a concept in the DCU in 5 years then, yeah, technically. It's still the direct result of Krypton's cold case. To me, that tangibility of a thing that Clark directly worked on that he wouldn't have done otherwise is more direct than the more nebulous (though elegant) version of the destruction of Krypton. Again, with the natural destruction Clark would've done all the same things for Earth simply off the strength of being a good dude, and his parents, and there wouldn't have been anything--any moment to tangibly divorce Clark's good nature and the Kents' teachings from whatever he felt about Krypton as a direct link of how he's saving the world.
But not really, though. That line starts and stops all over the place. You still get Superman doing "everything he can to protect his adopted world" regardless of how Krypton blows up because he's a good dude with powers and he was raised right. One of the things he's praised for as a character is doing the right thing because it's the right thing. That's why quite a few versions of him can work with him not learning about Krypton till much later.I think you can draw a fairly straight line from "lost his homeworld" to "does everything he can to protect his adopted world" too.
The straight line that's most often drawn is "Clark's a good man who was raised by good people" to "he does everything in his power to protect his adopted world." That has no starts and stops in it.
It's all gonna be about what he does next, I feel. That's the test, for me. The pieces are set, stories are seeded, and the family of books is larger and overall stronger than it's been in in ages. We're at a boiling point, so what comes next is where it's really at for me.The stuff Bendis is doing to move the mythos forward.....dude deserves a medal for that effort. Been far too long since we had someone who wanted to do anything other than wallow in nostalgia, deconstruct everything, or reinvent everything. And I'm enjoying this new death of Krypton (I can't say that enough!) but I do find it less elegant.
But I'm happy to hear he's not in this alone. Rucka and Fraction apparently come over his place weekly to talk about Superman's world and how they can better flesh it out and improve it.