Speculation: if you could redraw Canada's internal (and perhaps, external) borders...what could you imagine? What would be ideal, or potentially more so than the current arrangement?
In terms of internal borders: would it be a good thing for Ontario to be carved up, given its overwhelming domination of English-speaking Canada? Would Canada be better served with two or more majority French-speaking provinces and/or bilingual provinces (this could mean Quebec being carved up, or Northern NB and Eastern Quebec being a province, or Northern Ontario being a bilingual province, or what have you)? Would you amalgamate PEI into NB or NS? What about Labrador? Would you merge Manitoba and Saskatchewan, or perhaps create a province that consists of Northern Saskatchewan and Alberta (with Edmonton, and maybe Saskatoon) and another with Southern Saskatchewan and Alberta (with Calgary and Regina)? Would Vancouver Island be a separate province? A national capital region that is separate, politically, from Ontario (or Quebec)? What about the territories?
In terms of external borders, what could have been realistic, alternative universe frontiers? Northern Maine? Vermont? Alaska Panhandle?
have fun and try to keep it civil!