Amtrak has made updates to their proposed plan for Florida, as given in a presentation to the Florida MPO Advisory Council last month:
https://mpoac.cutr.us/wp-content/uploads/2022/05/Presentation-MPOAC-FRC-PassRailWorkshop-20220427.pdfSome interesting things:

A new additional service between Sanford and Tampa, with four round trips, as well as the extension of the Miami-Orlando service to Sanford. Wonder if this could mean removing requirements to have a car for the Auto Train.

A proposal, similar to the ones from the early 2010s, to reroute the Silver Meteor onto the Florida East Coast Railway and then back onto the state-owned corridor in South Florida. Unclear how this would interface with Brightline, or how stations north of Brightline’s current improvements would be handled.
Best for last…

A map of proposed stations that includes Miami’s airport Intermodal Center, an “Airport” station (my guess, more likely the SunRail airport
transfer station that Brightline and Orlando-area officials have been discussing for a few weeks now with their Sunshine Corridor Program), and very interestingly, stations in Orange Park and what appears to be downtown Jacksonville. Sounds like the right people got in a room with Amtrak.
Surprise bonus:

A map of “future options” that include the Gulf Coast corridor, St. Augustine and Palatka, an extension of SunRail to Tampa and Daytona Beach, as well as a web of regional lines extending from the Tampa Bay Area. Very interesting all around.