I think it'll be just closing announcements. IF they announce a full attraction it'll be Fallon (which is still not booked til 2017 but eh, Universal announced Volcano Bay so it's not like they're that gun shy), and F&F would be extremely vague, vaguer than SWL... I know Twister will most likely be before Disaster at this rate. So I'm guessing Disaster will be just after the holidays.
So, my prediction right now:
Universal Orlando Resort announces plans for 'Jimmy Fallon' attraction and 'Fast and Furious' attraction. Former attractions 'Twister' and 'Disaster' set closing dates for November 1st, 2015 and January 4th, 2016 resepectively. (goes on to give specific details on 'Fallon' attraction, opening 2017) The 'Disaster' attraction, Universal notes, will be home to a future ride based on their 'Fast and Furious' franchise, but won't give out any more specifics. (something something Supercharged in USH)
Locking it in, Regis.