I'm not sure why anyone thinks this is a Hyper Adapter? I'm mean did it say something like that in the description of the issue or is it just speculation based on the cover alone? I just hope I'm not missing anything.
If it's the latter then I'd like to add my 2 cents in. I think it's just Vyndktvx himself trying to expunge the very concept of Superman from all of time as we can see from the fact that Superman is shown to be in his t-shirt and jeans and in his armor being "operated" on. It seems to be that this is just Superman being picked apart all through out his personal time line at once as only Vyndktvx can manage because of his 5D status.
Side note: I actually read through issues 5 and 6 of Action comics (original printing) and it seems to me that that takes place at some point in the final fight or just before it. One thing that really stuck out to me was the comments that Erik Drekken said. In one instance he says "I'm there at the end with the rest--the Anti-Superman army--a bloody red sunset at the end of days--a planet of skeletons--and you--I have to warn you...it's not the end not yet..."
I think the end of days is referring to the end of time in issue #15 of Action comics. Also we see that Erik is warning Superman of all of this. We know from the 0 issue that he is not out to destroy earth or anything like that...in fact he's there to save it...from the Multitude aka Vyndktvx. How would Erik feel know that his revenge on Superman could get the earth destroyed by the very thing that he changed himself to beat?
So I think one of the back ups deals with this "climactic moment" and it could lead to Superman's victory.