"A dozen planned hotels in downtown Indianapolis could add nearly 3,000 rooms for visitors to the city."
Link is to a video naming multiple planned hotels on a map of Indianapolis, some opening in time for next year's Gen Con, some not, others as far out as 2021, and a few without opening dates. Some unfortunately are not close to the ICC; they're still downtown, but one is so far at the end of Mass Ave, it's practically near the north I-70/I-65 split. Others, however, are nearby, but only one seems close enough to be connected (the proposed Pan Am center one).
These are "planned", and while I'd hope that the ones with launch dates are firm and will happen, there's nothing in the video stating that these are certain to be built. So some of this might still be pie-in-the-sky. But, even a few more rooms being built will help. And nearly 3000 more rooms would help a LOT.
Crossing fingers for this.