The most discouraging piece of information that has been told to me is that the Belle may be beyond repair. Or, that the cost of repair may be outside the limits of what Disney is willing to spend.
Pair that with the rumor that if the L.B. doesn't return to service, there are already artist's renderings of a bridge to connect Frontierland to Tom Sawyer Island. Thus, eliminating the rafts.
If true, this would mark an end to all water vehicle traffic on the Rivers of America. I, for one, hope that the Belle returns to action in April. But, was told "don't count on it."