Swr 444 desiro and gwr 158 with a.i brighton services along the line. Branch off from Fareham to eastleigh and also Southampton dock to eastleigh as freight class 66!?
If you include the line across to Havant with layers for the Class 166, 313 and 377, it would be an excellent little SWT/SWR route. My similar suggestion from a while back: Portsmouth Southampton Eastleigh Network | Dovetail Games Forums