Would be pretty easy to make some sort of formula
Teams in previous WL final stay in their conferences
Previous runner ups switch conferences
Teams lost in 2nd round- Those that lost to eventual conf champ stay, other 2 switch
Teams that lost in 1st round- Those that lost to teams that made conf championship switch, other 4 stay
Incoming Teams
Each Pro league sends 1 team to each conference
Each conference gets 4 league champs
Use some Point system to assign each team a point value and balance these values as close as possible - For the sake of this idea I gave 1 point for previous ssn's league runner up, 2 for champ, add 1 point for each season the team has previously spent in WL, add .5 for winning championship vs previous wl team.
If you went by that method conferences would be...
Alpha
returning- Chocolate, Kai, D9, Saigon, Hounds, Alpine, Moose Jaw, QCBC
new- Defenders, Korb, Krungthep, Monowi, Tyrrhenian, Osaka, LOL, Silent City
Zeta
returning- Lincoln, Gurupies, Hali, SoCal, Gunny, Speyside, Mayan, Shockers
new- Honolulu, Parma, Smurfs, Charlesburough, Russian, Rosarica, Carthage, College Town NWA