To use the spoiler tags, type [ spoiler ] when starting it, and [ /spoiler ] when closing it. Be sure to remove all of the spaces.
It should look like this:
But on-topic, consider this:
This is a MASSIVE step up from the rest of the series. In Rockstar's eyes, they wanted everyone to be entirely surprised when opening their game the day they purchase it, and seeing massive, living, breathing world, unparalleled with ANY other GTA game, or any game for that fact.
It's quite a step up from the past GTAs, so Rockstar really wants to surprise people come launch.