Once the south line opens (est end of the year), the 69A which currently runs to Aberdeen on an infrequent schedule will operate as follows (from Paul's newsletter).

MTR South Island Line (East) 南港島線(東段)
MTRC has announced that the South Island Line (East) will start operating at the end of this year between Ap Lei Chau and Admiralty. Minibus 69A will be extended to the Wong Chuk Hang MTR station and operate every 15 minutes from Mondays to Saturdays from 7am to 7pm and every 30 minutes on Sundays from 10am-5pm. The fare is HK$6.