Seems like you have a very interesting prospect brewing over there.
Historically, the IJN has 4 powerful carrier groups, i.e. the Akagi, Kaga, Hiryu and Soryu
While the USN possessed the Enterprise, Hornet and Yorktown.
The advantage of the USN is having Midway Islands with their AA installations and some Army aircrafts (which of course, we all know contributed nil to any damages to any IJN warships).
While IJN advantages is having a massive armada (including the infamous Yamoto and some powerful cruisers) that dwarfed those of the USN.
It remains to be decided whether you want this to be played out accurately historically or just any random ship configurations will do.
If it's the latter than it would be easy for WG to implement, otherwise WG have to change the battle machanics to come out with historically accurate carrier stats and battle groups.
Of course, if they are willing and managed to come out with a new battle mode to allow players to jump right in to a battle, allowing them to choose any carrier groups with pre-selected battle groups to escort them without considering whether the players possessed any carriers beforehand, then it would be feasible and not to mention lots of fun if players are given incentives to play this game mode (remeber what happened with historical mode in WOT?),
I would forsee that Midway Island will be the point of capture, as it is the main obejectives of the IJN while the USN will be alloted the task of defending the island with AA installations intact to discourage bombing from the IJN airforce. Once the IJN players captured the island, the USN players will have a limited time to recapture the island, barring which, any sides who hold the island for a certain amount of time will achive victory or when any sides lost all their carrier groups.
Anyway, randomised CV vs CV would be a great idea as it would meant the importance of aircarft carriers would be tried and tested realistically with AA, battle group formations, CAP, radar searching, scouting and intelligence all played out in tandem. The vital importance at hand is to have a map large enough to accomodate this gameplay and battle time would be increased accordingly.