On a serious note you can have N number of speculation on who the real creator is, unless someone signs a message from the genesis block, no one can claim that spot.
That would be the most logical step for the real Satoshi to do and everyone will really believe on that no question asked. But the problem is that since we are all dealing here with fake claimants to be the real guy, they can't and won't do it so they usually formulate so many excuses and reasons just for the fools to believe on them. I think the list will grow in the coming months and years especially if there can be a bull run for our favorite coin since many do like the limelight of the media and the attention of the people. So who can be our next candidate next week? Maybe we can also add Donald Trump to the list.