Let's look at the weak links first off to see which team would be the first to double team.
Superman = Strong all around, but may be exploited by Surfer, or Ghost Rider.
WW = No glaring weaknesses found, except that there may be others on team two that are more powerful than she is.
MM = Fire?
Captain Marvel = No glaring weaknesses found
Black Adam = No glaring weaknesses found
Aquaman = Quite possibly the weakest character on the field, as well as being one of the slowest in term of on land travel speed.
Flash - Wally = Durability issues
GL - Kyle = Solid tank/mage, may have trouble with the physically dominant
Dr Fate - Hector Hall = Quite possibly the most powerful character on the DC field (possibly)
vs
Thor = No glaring weaknesses found except for psi attacks but can resist, as was seen with Glory.
Sentry = Weakness. His mind, but this could work against the one messing with his mind as well. Approach with caution.
SS = No glaring weaknesses
Dr Strange = Same as Fate
Gladiator = No glaring weakness except for the fact that he is a faith based character, and could be exploited in this way by a strong enough psi talent.
Black Bolt = No glaring weaknesses, except for the fact that there are physically superior characters than he is on team DC.
Captain Mar-vell = Same as Black Bolt
Ghost Rider = Depending on who he fights, he may be able to put them down as soon as he makes eye contact.
Count Nefaria = Questionable stamina issues, but is every bit as powerful as Superman without the weaknesses.
Looking deeper into this, I would think that Aquaman is the weak link among a field of powerhouses, and could see him losing to anyone on the Marvel team. This would open up the first double team.
In my opinion, Marvel would win this by the slimmest of margins.