Maybe it's just me, but I love list like this. While I know there is a whole rumor thread (and website), I also like this here in it's own way to keep track of possible things for the 50th. I think it would be neat to see these things (and possible updates to it over time) categorized. I am certainly not the person to do it, but I was thinking categories like:
Under Construction [16] - Tron Coaster, GotG Coaster, Space Restaurant, Rat ride, Star Wars Land + rides, Mickey and Minnie railroad, NBA experience, Skyliner, Coronado Tower, Riviera Tower, refurb of tomorrowland facades, Club 33, Star Wars Resort
Permits or Confirmed by Insiders [13] - New Nightime Parade, Illuminations New Show, new China Film, New Cirque Show at Disney Springs, Circle of Life Replacement, Refreshed France Film, new fireworks show (wasn't sure, and was too lazy to look it up), New Swan and Dolphin Hotel (but does it count), Carousel of Progress Update, Lightning McQueen Show, Spine Renovation{3}
Currently Blue Sky Concepts [12] - Speedway Update, WOL rumored replacement(2), Brazil, Mary Poppins ride [wasn't sure where to put this}, Ride/Attraction at DHS/DAK, People Mover update, Seas with Nemo Update, New Resort, Project 89, Living with the Land Update, replacement for a show at Hollywood Studios, Stich Replacement
Not likely to finish by 50th [8]- Launch Bay replacement, Yeti Fixed, Coco Overlay, Star Tours Replacement, New Monorails (I imagine this has a better shot than I give it but I kind of put it here hoping someone corrects me), Path of the Jedi Replacement, New Hub show at HS
Wishful thinking [10] - Thunder Mountain Third Lift, Hatbox Ghost, spaceship earth update, Fantasmic! Update, Primeval Whirl Replacement, Nemo Theater replacement, rivers of light update/replacement, tough to be a bug replacement, new slide at blizzard beach, 50th parade
Signs point to...maybe [3] - Small world adds Disney characters, Jungle Cruise adds movie tie in, Pixar short film replacement)
etc... Again, I am not the best for this, as I know I have things wrong and missed things already, and I might be the only one that would find this interesting in parallel to the rumor threads/websites.