Given FFG have just invested time and effort in not only putting out new models for EPVII but also tidying up the rulebook i think we can rest easy that its unlikely a '2nd edition' in a true sense is going to come out for the duration of the new movies.
By that i mean an edition that would invalidate collections or drastically change the game mechanics.
I'd like to hope this is true as i was really worried a future edtion might do an 'age of sigmar' on us and require a stack of new bases, dials, counters etc even if the ships were still usable.