FreizeitparkCheck.de claims that they have been told by an "usually very well informed source" (however they do not want to reveal their source) that Rookburgh will feature
the park's third themed hotel. The hotel will also eventually become the new home for Fantissima (the park's dinner show) at a later date - they claim that Fantissima will stay where it is for a few more years as
the park's next project will be replacing Geister Rikscha, not Temple of the Nighthawk and Hollywood Tour as was previously assumed/rumoured. They claim the China Town redevelopment will also see the area, including the Hotel Ling Bao, rethemed to a Tibetan/Himalayan theme.
The Rookburgh announcement sign did refer to experiencing the area 'by day and night' - interpreted by many to be a hint at a new hotel or/and a new Fantissima theatre. However with the announcement of F.L.Y. being the world's longest flying coaster and rumours of another family attraction in the area the hotel speculation had died down. It seems unlikely that they could fit a hotel in the area as well.
But maybe they can fit a hotel in?
Or the hotel could be on a bit of land not yet built on.
Between the current construction site and Wuze Town is a triangle of land which currently houses a backstage storage yard and a house. (highlighted in orange)
Alternatively the admin building between the site and the Berlin entrance could be replaced by a hotel. (highlighted in red)
A user on the FreizeitparkCheck.de forum suggested the Berlin car park as a possible site (highlighted in blue) and then the park could connect it to the area via a bridge over the road. Although the park like to integrate their hotels with the area so I can't really see it being across the road.
Personally I'd take these rumours with a pinch of salt until there is any firm evidence. I certainly have my doubts over their claim that Hotel Ling Bao will be rethemed.
Also if the park were to build another hotel anytime soon many had expected it to go behind Kaiserplatz and the vertical garden wall at the Taron extension queueline.