Bluesparks & Elucidate - When this happens, if there is a lot going on within the world already like there is now (ie. economic difficulties, personal issues coming up to be resolved, political changes, etc), there will be a lot of people already looking for answers, some deeper understanding, or at least to be out of pain. It will make it easier for the average joe to accept because it can be seen as something that might reveal a greater truth or have some real impact on life.
And you're right - some people might be shaken to their very core. If we are only living at the basic level - moving from pain to pleasure - then it might be difficult to initially adjust to this. But then those are the exact people that have a hard time adjusting to any change. It will likely be the most difficult for people with a strong need to be right about their version of reality (i.e. human history, religion, science), which is why it has taken so long to get fully revealed.
Will it be shocking to some people? Yes likely. Will the leaders try to help people integrate and understand this so they don't panic? You bet. Do we have to worry about being killed/enslaved by them? No. Do we have to let the mass unconcious herd that is afraid of change/greater understanding steer the rest of us? Absolutely No. The more we bring issues like this to the table, the less power they have over us. If they're simply left in our subconscious, or for the horror movie on Friday night, not much of a chance is available for transformation.
But then the same thing happens if we think that spirituality is something to do at a designated time and place (i.e. 10am at church), instead of recognizing that we are all Source/Creators in every moment.
Derelle & Mynder - Yes, you and Mynder are on the right track about this. Gradual release of real information, with a mixture of Hollywood media to see what the reactions are - that's been going on for decades already. Having meaningful discussions like this one can also help prepare people so the shock isn't so much.
JoeBenz - There are so many people on forums like this that would like nothing better than for aliens to publicly reveal themselves, but how many people in the world do you think don't even like forums like this? Part of what is going on is the recognition of how much of a game changer this can be, and to not interfere with us humans in how we our handling life/naturally evolving. It's a delicate issue to be revealed at a time that will be beneficial. Our lack of consciousness which precipatates things like wars, is one reason it has taken so long to publicly come out.
One reason people stay greedy is that they aren't connecting their thoughts with their feelings, and they aren't giving themselves what they really need - including embodying what they want from others. And you're right - the more people that know who they are, why they are here, the less we struggle with anything outside of us.