Well we did have Diamonds and Pearls found in the Safari Zone allowing people to either recieve two basic DP Pokemon upon its release, or a first stage DP Pokemon. Maybe incorporating key items would allow for the uncovering of legendary Pokemon?
There is loads of way to incorporate non-battling-skill in the Safari Zone, but it may teeter on RPG, which I know some people aren't keen on.
I honestly feel legendaries in our ASB would be a privelage; a gift. Maybe if someone can earn all the Gym Badges in our ASB they would deserve a legal legendary.
Obviously this is all if we decide to pursue it. TBA I'd be keen to hear what your unarticulated thoughts are...when you articulate them :p
Any more thoughts?