Alright, with any new team/relocation speculation, three questions need to be answered.
1) Owner - Who is putting up the money for the team, and how deep are their pockets? If you don't have an owner, it's a non-starter.
2) Arena - Do you have an arena of at least 3,500 seats with a video board, and if not do you have a council or rich owner who is going to get you to such a facility? Owen Sound is the exception here, not the rule. I doubt the OHL wants to move to another markets that just squeaks in as far as amenities and size is concerned.
3) Support - How do you intend to draw 3,000+ a night? Once again, Owen Sound is the exception, not the rule. Most OHL markets are at least 50,000 in size, and usually larger. What history of the game does your city have? Do you have a lower league drawing similar numbers/packing your current arena?
So, I think 3 is pretty much ok in Chatham. 100,000 is a solid size. From my understanding though, 1 and 2 still need addressing.