Donald's Boat would be replaced by this ride called Donald's Dock. The queue for the ride is a new version of Donald's house and boat all mashed into one, but not featuring any interactive elements. Donald's Dock is a new water ride, intended not just for kids, but for anyone with or without kids. The entrance looks something like this:
http://4.bp.blogspot.com/_OO7WbmARD08/SQoROaB6dkI/AAAAAAAAJGE/g1T_YpXT_ow/s400/Donald%27sDock90.jpg.
The ride itself is sort of based on this abandoned ride concept called Duck Bumps:
http://www.jimhillmedia.com/mb/images/upload/duck-bumps.jpg.
In the queue, there will be interactive elements, like in Indy, for in the event of long lines so guests won't get bored. One thing it would have is a rope for people to tug on. It would be based on a rope shown in the IJA queue for people to pull, while a sign next to it forbids that. When you pull on that rope, you hear a British-sounding man yelling at you for doing so. In the queue for Donald's Dock, when you pull on that rope, you hear Donald yelling at you for doing so. Another thing I was considering having in the queue is this tasteful-looking map, found at WDW's Toontown Fair:
http://land.allears.net/blogs/photoblog/Donald_Ducks_Boat_in_the_Magic_Kingdom.jpg.
Anyway, the ride itself, of course, would not be a bumper boat ride, it will be more like TDS' Aquatopia. It will be functionally the same and everything. As on that ride, your toon-themed watercraft will twist, turn, backup, spin around in place, all while taking you on a seemingly random trip dodging jagged rocks, spinning whirlpools, other watercraft and streams of water fired at you from both strategically-placed frogs and also from Donald's nephews, Huey, Dewey and Louie, who all wait on some of the rocks to let you have it with water cannons. The direction your vehicle travels in is not random, of course, but controlled by unseen technology borrowed from Tokyo Disneyland's Pooh's Hunny Hunt. The ride takes place on a brand-new Toon Lake, which is partially where the new coaster (either Goofy's Driving School or Goofy's Goof Coaster) replacing Gadget's Go Coaster will also take place.
With this ride alone, there should be more reason for people to spend more time in Toontown and do more than just the Car Toon Spin and Mickey and Minnie's houses (all of which will remain by the time that I'm through).
Oh, and I almost forgot: Toontown will be expanded to feature the new rides. I can't find an overhead map of it right now, but when I do, I will put it up. Also, the position of the Toontown train station will be switched so as to actually be in Toontown and not necessarily in Fantasyland. The station will remain.