[cartermatic]

I think there's a few things to note (as someone who used to live in Orlando):

1) The actual city of Orlando is about 9miles (as the crow flies) from the airport

2) The Brightline eventually plans to go to Tampa on the west coast of Florida, but is coming from South Florida

3) The existing Amtrak/Sunrail lines run south-ish to north-ish on the west side of downtown Orlando. To use the existing routes and knowing where Brightline plans to go, it'd likely have to go through the airport anyway, then curve north to downtown Orlando, then turn around and head back down southwest-ish to Tampa.

4) At some point they hope to connect the existing Sunrail commuter rail to the airport, so you could take that to downtown

5) There's not really a whole lot to do in downtown Orlando itself, not a ton of shopping, restaurants or entertainment. Most travelers to Orlando are there to go to the theme parks that are outside of downtown.