EDIT: Back to Blizzard Beach, I think it's worth mentioning that Runoff Rapids, which consists of 3 separate tube slides, has been closed since late January with no re-open in sight (keep in mind that Blizzard Beach reopened from it's 3-month refurb in January).
There has been no work done in the way of fixing these slides since then and supposedly they may not even be fixable. The foundations of the slides are in very rough shape, so while the park could be seeing an expansion, it's also possible that it just ends up as a replacement more or less if they have to tear down these slides.