- You forgot Fat Albert and the Cosby Kids (arrested by Batbots) and several Marvel characters (seen in the background of the final fight scene) are also somehow canon. Although Batman: The Dark Knight Returns can't be canon, there are ruins of Wayne Manor look smashed no burned and Green Arrow has two arms.
- The Manor could have been rebuilt, and the arm could be bionic or regrown via one of the many mad scientists of The DCU.
- Actually, in the original script, the Bat knights where supposed to be an army of followers much like the "Sons of Batman" seen in DKR. The Robotic versions weren't to be introduced until later. In fact, many of the things you talked about where last minute changes too. They even cut out a sizable chunk of the first chapter, dealing with the Justice Battalion before the battle in Kansas (which would have been the climax of the first issue), which would have shown Captain Atom as a Dr. Manhattan like figure. When the editorial ordered it shortened down from six issues to four they re-wrote it.
- Rorschach and The Question are seen talking in the bar. So, perhaps Doc wasn't kidding with the "doubt he'll make it back to civilization". He tossed him into this universe.
- Of course, why do you think he was named that? It was meant to be symbolic.
- Doubtful. He wants to rid the world of the super-powered people. Its unlikely he intended for Superman to go berserk.
First, Kingdom Come depicts the pre-split back together universe (which is different due to splitting, allowing changes to occur and remerging). We just don't see the non-yet aquired Wildstorm cast.
Two, Wildstorm was split off first. Watchman is some fragment or shard that gets lost in the splitting process. We see "Under the Hood", Rorschach in Kingdom Come as it is already breaking loose, flapping at the edges. When it breaks away it snaps the fully powered Captain Atom into two. Part of him remains.... him, for lack of a better descriptive. The other part is Doctor Manhattan.Depending on the Writer far exceed those of Lexcorp. So why work under Luthor? In the main story we see Luthor take much of the fall for the disaster at The Gulag, but what if his plan suceeded and much of the world's superhero population was slaughtered in one foul swoop? Savage would be one of the last metahumans in existence, could dispose of Luthor easily and proceed with his constant goal of rebuilding the world in his own image.