Got some time on my hands so here goes:
48 team MLS/Liga MX merger
Western Conference
Pacific Division: Los Angeles, LA Galaxy, Portland, Sacramento, San Jose, Seattle, Tijuana, Vancouver
Midwest Division: Austin, Colorado, Dallas, Houston, Kansas City, Phoenix, Saint Louis, Salt Lake
Eastern Conference
Central Division: Atlanta, Charlotte, Chicago, Cincinnati, Miami, Minnesota, Nashville, Orlando
Atlantic Division: Detroit, DC United, Montreal, New England, New York, New York City, Philadelphia, Toronto
Conference MX
Division Oeste: Atlas, Guadalajara, Leon, Monterrey, Morelia, Necaxa, Santos, UANL
Division Este: America, Atlante, Cruz Azul, Pachuca, Puebla, Toluca, UNAM, Veracruz
Schedule: Division x2 (14), Conference x1 (8), Non Conference 2 games from each division (8), 30 games
Playoffs: 24 teams, Division winners plus two best non division winners get byes. H/A throughout
64 team CPL/MLS/Liga MX merger (this should be fun)
Western Conference
Pacific Division: Las Vegas, Los Angeles, LA Galaxy, Phoenix, Sacramento, San Diego, San Jose, Tijuana
Mountain Division: Calvary (Calgary), Colorado, Edmonton, Pacific (Victoria, BC), Portland, Salt Lake, Seattle, Vancouver
Conference MX
Division Oeste: Atlas, Guadalajara, Leon, Morelia, Necaxa, Queretaro, San Luis, Santos
Division Este: America, Atlante, Cruz Azul, Pachuca, Puebla, Toluca, UNAM, Veracruz
Central Conference
Southwest Division: Austin, Dallas, Houston, Juarez, Kansas City, Monterrey, Saint Louis, UANL
Midwest Division: Atlanta, Chicago, Cincinnati, Columbus, Indy Eleven, Minnesota, Nashville, Valour (Winnipeg)
Eastern Conference
Northeast Division: Detroit, Forge (Hamilton), Halifax, Montreal, New England, Ottawa, Toronto, York
Atlantic Division: Charlotte, DC United, Miami, New York, New York City, Orlando, Philadelphia, Tampa Bay
Schedule: Division x2 (14), Conference x1 (8), Non Conference 2 games from each division (12), 34 games
Playoffs: 32 teams, top 4 in each division advance, World Cup style tournament, higher seed host until the final which will be at a neutral venue. Sample Group would be 1st SW, 4th MW, 2nd NE, 3rd AT
After doing all that, I'm not sure I like this merger idea.