Along with the parking garage and ramp expect new transit options (red trolleys would be a cheap option and a new parking figuration would allow the current route along the eastern side of the complex to be closed to vehicular traffic) connecting/better connecting this whole section of WDW, including the resorts, Typhoon Lagoon, and DTD.
Also expect a few new rides, despite it's current downtime (due to completely other reasons) has been hugely popular. Expect some more 'rides' like this (I'm hoping but highly doubting that this will include a double Ferris wheel near Cirque, which should be getting a new show about the same time as all of this is finishing up). The putt putt golf is out though.
From my understanding the parking redo will actually include both sides of the street, meaning that the TDO parking will be affected and will become, at least partially, garage itself.
All of this begs the question though; Is Disney finally attempting to copy Universal? Heck from what I've been told they've even been out to Fun Spot and Orange Ave downtown (more unofficially than officially), and oddly enough Vegas in search of what to do with DTD.
It's a bit off topic but I heard a bit of an odd rumor, that all of this ramping up and improving around property isn't just to stay relevant but is also part of a long term (read 10-20 years at minimum) of having WDW host some type of major international event (not the Olympics by any means so don't get that in your mind, but something major and international). There was even talk of actually redoing and improving EPCOT to assist in hosting this event/s. But from my understanding all of this is still just chatter and nothing even semi official yet. Just something to chew on.