I can't wait for that.The Brightline rail system will be up and running 2022? Miami to Orlando however the Brightline train ride from Orlando MCO to WDW won't be happening at least for the next few years.
When I lived by myself in Miami, several of my weekend WDW trips were on a one-way flight (either AA or Delta out of MIA) to avoid weekend traffic getting out of Miami and renting a car for the return.
On weekends it's a 5 1/2hr drive vs a $30 one-way flight and 2 1/2 total hours to get to the airport, do TSA, get to the gate, fly to Orlando, rent a car, and arrive at WDW.
And on the way back, I'd get dressed for work before driving down, hit the road at 5am, make it to work before 9am and return the rental car during lunch.