Bell MTS Place would be the venue it's on Portage Ave in Winnipeg proper. I don't see why they couldn't do a show there. You could conceivably get approximately 17000 in there for wrestling. Now I'm not sure if running shows in Canada is a priority for them right now or not so the likelihood of it happening in the foreseeable future is a mystery.
Bell MTS Place is probably their best option, and they could sell plenty of tickets for a show that features some kind of match with Omega and Jericho. A much smaller venue is the Investors Group Athletic Center. It’s the basketball arena on the campus of the University of Manitoba, which seats about 3100. It would be ideal for a house show, but probably not a TV taping.