If this is ever going to happen, you have to keep it simple...no tests, weight classes, age divisions, before pics, etc. Pick a date on which everyone submits good quality pics of all seven mandatories and have a pannel of other Getbiggers decide the placings. I nomimate Royalty, ND and Hulkster as three of the judges.
After we get the 1st Mr. GetBig done, we can evolve it to have better rules, divisons, classes, etc. For now JUST KEEP IT SIMPLE!