This is so easy...
Is "Single Timeline" Canon?
Yes.
Is Multiple Universe Canon?
Yes.
Is coexistence possible?
Yes.
The difference in this instance is the Red Matter induced Black Hole. It is what caused the jump from one Universe to another.
Wasn't that easy?
As I have been saying...there are many valid points on either side of the argument. But where in the dialog of the movie is it ever stated that the Red Matter induced Black Hole caused Spock and Nero to jump to a Parallel Universe? It is not there. Your speculation is entirely plausible but because of the ambiguity of the movie so are other explanations.
The debate continues...![]()
It doesn't have to continue, just Let go, Luke!
Let me tell you a quick story, one that shocked and amazed me. My Mom is a Trek fan, I got her into it back at the beginning. She wasn't rabid, like us, just a casual fan.
After she saw Trek 09, I asked her what she thought had happened; was it the same old timeline which had been changed or a brand new universe, like the Mirror Universe? She responded, new universe. "What makes you say that?" I asked. "I don't know, it just seems right." She responded.
Even more amazing, my Step-dad, the King of the Canonistas, agrees. He said he could see how it could be seen as the same, old-but-changed, timeline but he believes the spirit of the film was to create a new Universe while preserving the memory of the old, something he respects of its creators.
I & countless others agree. Turn from the darkside and join us.![]()
All in all I can accept this movie as being in a new universe even though I find things in the movie to contradict that. Although I may fight on the side of the movie being a linear story I don't fight with that much intensity and despite my quibbles I can accept the writers intent even though I wish they had been more direct about it.