It's pretty much guaranteed to be Winchburgh, being the only one that's actually funded
Winchburgh 2028/2029, or a reopened Inverkip [nee IBM] 2029/2030.
One of Bridge of Earn, Abernethy or Newburgh seem likely for about 2033, depending on how various things go.
After that, Cove and Newtonhill as a pair, probably as part of the just transition money that we expect to start trickling into Aberdeen in the next few years.
Realistically, the next one probably should be Bonnybridge, but that's five years out at a minimum. If the local authority decide they want it, then there's services that can slot in an extra slot, its in the middle of a nice big built up area, and its technically feasible.
There are a couple of marginal business case ones that slot into this same category; technically feasible and lacking sponsors, but these have a more questionable value for money. Mossend, Elderslie, Cumnock, Mauchline, Dysart, and Cambus all fall here.
Mossend and Elderslie are both short distances from stations in either direction and are on busy lines, so maybe it's just not worth the bother for any new passengers they'd draw versus just shifting travel patterns.
Cumnock and Mauchline really need a solid 1tph to work, which means doubling the service from Kilmarnock through to Dumfries, which is expensive, and needs more, newer units to really attract punters.
Cambus you could build tomorrow, but there are space issues for where you put the car park, and it's bang in the middle of a maze of bonded warehouses and I'm not sure HMRC would really want to move.
Dysart you could also build tomorrow, it gets a nice even 2tph service, but there's nowhere obvious to build it without knocking down a few houses.
Grangemouth has been discussed to death, and neither it, nor Dunfermline - Alloa, are reopening this side of 2035.