Not that it would ever happen, but one of the replacement items announced today is reopening Stoke to Leek line.
In practice that means the existing heritage railway with this extension would be 4/5 miles away from Alton station having mainline access (or what is broadly agreed would be a separate platform at Stoke station)
We’re talking a decade away from happening, but certainly it wouldn’t make sense given all that expense to not make the final push from Froghall to Alton.
And before replies start about access to the park etc, this could be achieved using the old coach entrance up to coaster corner. And Alton Towers actually own the historic Alton Bridge building boarded up so could make an incredible ticket and information centre.