I don't know. I'd like to think there would be a way to make it work and keep Roger; but, it really depends on how they want to use the space. When Star Wars was going there, it was going to have a lot of indoors spaces especially on what was going to be the footprint of the western part of Toontown. This was due to being in fall out zone for fireworks. I don't know how far east that extends.
What I heard late last summer was Frozen in the shorter term occupying the top of the hill and into the expansion pad and eventually being reworked into the areas going back into Toontown, with the potential for a large scale combination (attraction/restaurant) building in the fall out zone leveraging the work being done for TDL's B&B ride.
Who knows what will happen between now and then?
Just remember with Disney Parks, until construction starts (and even after in the case of things like Pop's Legendary Years), nothing is guaranteed. Something will eventually happen with the Toontown space. Operationally, it's too big of a missed opportunity to not address. It's just a question of when. For those wanting a 3rd gate, the sooner there is no room to expand (and thus squeeze in more guests), the more probable it will become. The best news of what's in the known pipeline, if/when those plans come to fruition and with the sure success that SW, Marvel, and Frozen will bring - we may finally get what we really want at DLR. For me, a 3rd gate that isn't across the Esplanade is very intriguing because if done right, it would have the capacity to drastically change guest behavior. No longer will people be able to swap parks without a time penalty. A gate down the street would finally be the pressure release valve that DL needs. I'm not knocking DCA at all anymore (well, slightly more after that orange monstrosity). After the 2.0 makeover, it has more than pulled its weight; but, as long as you can hop parks faster than you can get around EPCOT, a good percentage of guests that spend part of their day at DCA will still step foot into DL. Most experienced DLR guests just think of it as one big park.