It looks as though 787-8 number 8 (try saying that over and over again...) will be based in LGW for next summer from the current schedule:
JFK - 6 weekly (3 weekly S14)
LAX - 4 weekly (2 weekly S14)
FLL - 1 weekly (2 weekly S14)
It is a shame to see FLL reduced so soon, although I expect concerns about punctuality put off a lot of potential cruise passengers. However the increases to JFK and LAX should help make DY a more appealing option by offering some additional flexibility for passengers. The above is 11 weekly flights in total so I shall hedge bets on a 2/3 weekly service to OAK being announced soon to fill the gap!
Source:
Norwegian S15 Proposed Long-Haul Service Changes as of 01SEP14 | Airline Route