Apparently Toronto is exploring the possibility of having an outdoor game at the Dome some time in the future. Link
I would absolutely love this. Sure tickets would probably cost an arm and a leg, but there would be 30,000 + more tickets available than there would be for any given game at the ACC. Not to mention I simply love seeing the Dome turned into another type of venue. I've seen so many live baseball games there, but seeing another sport or event is just extremely exciting. Here's to hoping they get it done.
Considering the popularity of hockey in Southern Ontario, it probably shouldn't be that difficult to sell to the NHL. The only issues that are involved are the functionality of the Skydome.
Here is the full article from the Toronto Sun