1. Phoenix vs Spectre
Jean,as White Phoenix of the Crown,And Spectre.They are in a neutral ground,freed from the influence of their bosses,and near peak level.They realize they are powerful enough to leave by themselves,and decide to have a beer at Mario's Bar,the pandimensional-omniversal hangout for every hip multiversal being,where they begin to exchange confidences and rant about their bosses,expecially The True One Above All,Plot Convenience:
S: "I'm supposed to be the Wrath of God,how come I cannot stop some street punks?" "Why I could not stop The Great Evil Beast,Parallax,Lucifer?" "why with all the work I do it is always Superman that gets the spotlight?"
P: "You tell me? One moment I eat a star,then I commit suicide with a kree pistol.One moment I soak up the electromagnetic field of the sun,the very next one I am killed by an EM pulse from Magneto.One moment I'm chased by a sh'iar starship,the other I effortlessly contain a black hole explosion"
And all those death/rebirths! I always have to ask what timeline is it! No wonder a girl gets confuses and blows up a solar system or two.But what really gets to my nerves is the disinfection work! I mean...intelligent bugs? sentient bacteria? a broccoli planet?
Oh Jean...the fire in your eyes..and everywhere else ouch!...
Naughty boy...you know I have always had a thing for pale,slim,troubled and humourless guys...(look at Scott Summers) why dont we leave and grow our own little Multiverse together?
2. Galactus vs Parallax
Galactus is fully fed,but he cannot resist that yummy green energy that transpires from that Parallax guy,so proceeds to eat him.Unfortunately this causes him a big indigestion,like when he tried to eat the Impossible Man's planet,and discorporates.Both are out.
3. Thanos vs Darkseid
The two fight exchanging insults (you are just a copy! -At least I'm not trashed by Superman every month).The OE doesnt work,possibly because it functions only on beings of the Dc Multiverse,or because no incarnation of Death in the Omniverse can stand Thanos anymore.
It goes on for a looong time.Meanwhile...
4. King Thor vs Superman Prime
The Ring is ineffective,because all GL energy has been soaked up by Galactus.King Thor uses Rune Magic to counter 5-dimensional magic.Thor with Odinpower against Superman with the Sword in one final blast.They kill each other for good.
5.Trion Juggernaut vs Doomsday
Juggy wins.Doomsday should reincarnate a lot of times to reach his level.But rules say "out at the first death" so he cannot return.
6 Iron Man vs Martian Manhunter
IM has inbuilt psi-defenses and anti-phasing force-fields.He will win with some trick (sonic cannon,thermic rays,whatever).
7 Captain Atom vs Hulk
I dont know much about Captain Atom at full power,but I heard he's a beast.I give him the win.
Second Round
Captain Atom vs Juggernaut
Juggernaut is totally unstoppable,so Atom overloads and,since when he overloads he quantum jumps away,he is forced to leave the field.
Third Round
Thanos doesnt want Juggy's help,so Juggy helps Thanos and Darkseid see things head to head (literally...Boing!)
Thanos and Darkseid are out cold.
Marvel wins!