Show has now been canceled. Here's the Facebook post:
"Due to reasons beyond my control Aug 26 House of hardcore Geneva Illinois regrettably has been cancelled. Legally I can not comment on this matter. Thank you all for your continued support. See you in November it surly will be one to remember. -Tommy Dreamer"
Considering how poor ticket sales were, according to another poster, I'm very skeptical that it was reasons beyond his control and he really can't comment.
I'm not sure what the legal reasons are, but the stadium is owned by the Forest Preserve District of Kane County. I'm sure a FOIA request of the contract would provide some insight.
A part of me died when kayfabe died. Kayfabe was treated with reverence. It was a privilege to be smart. It was a privilege to be involved in this business. It’s not because you had $1200 and could go online and buy a pair of f'n boots, and now you’re a f'n pro wrestler. --Ed Chuman.