To avoid people "lining" up --- similar (if you are old enough to remember) the lottery system ticket venues used to sell concert tickets. Everyone in line got a random ticket and based on that ticket number was where you got your spot in line to buy tickets. So you didn't need to camp out all night to be first in line. Whether you were first or showed up 1 minute before, you had an equal chance to be first in line.
If they do a lottery system for entrance into the land? That will be pretty darn awesome.
They will need to control flow into/out of this land at first .. and any way it can be done without the huge crowds at the gates and the "stampede" at rope drop .. the better. They probably learned a lot since opening Pandora.