I used the list found
here of the top characters from each side, I then seeded the top 32 against each other.
DC will always face Marvel Characters and vice versa. If there is an uneven number, the difference in top seeds from the winning side will get a bye (I.E 14 Marvel vs 18 DC would mean the top 4 for DC gets to set out the next round)
We will do this until we have the champion for Marvel vs the champion for DC. Each round will last a week.
Use whatever criteria you wish to make your choice.