I kind of have a problem with Sundipped Superman threads.
As far as I can tell, the only ways we have to gauge how powerful Superman is after a sundip is Our World's at War (with a somewhat short sundip) and Superman One Million (with an incredibly long dip).
So... I mean, maybe he'd beat Odin? I really have no idea. Maybe he needs precisely a week and three days and four hours to beat Odin. Maybe a couple days is cool.
It's like writing a thread for a character with no real feats.
Sundown was uber. The combined might of the X-Men, F4, Thor, A/P Dr. Strange, et cetera, couldn't do jack to SD... Hell, Thor's hammer literally bounced off of him: