I could see, if the east/west Sunrail comes together, it taking/using the Stanton line from South of OIA with stations in Lake Nona and Randal Park/Sunbridge. It could ultimately continue to Waterford Lakes and UCF, but how it would get there is anyone's guess as I see no easy paths North from Stanton.
I am very curious as to the new Westward path from OIA to "Disney". I've seen some reporting that the route goes North on current Sunrail tracks near Orange Ave to Taft Vineland Rd to SR528 and John Young Parkway. I don't see this a reasonable route for Sunrail. For Brightline maybe as it is direct to the OCCC, but that doesn't work for commuter rail. It bypasses a major potential passenger Station at the Florida Mall/ Orange Blossom Trail. I think it needs to find its way up to 528 before John Young Parkway, but there are no easy paths for that.
The future looks to be very interesting.
Future East/West Sunrail with stations at I4/ 535 [Disney], SR528/Destination Parkway [OCCC/I Drive], SR528/Orange Blossom Trail [Florida Mall/Hunter's Creek], OIA [connection to current Sunrail], Lake Nona, Randal Park/Sunbridge, Waterford Lakes and UCF.