I have read a lot of the comments and thoughts from this post and it seems to me that they are all well thoughts and speculations, however I have followed the topic on my own and would like to bring some (Probably controversial…) information: I do recommend checking out:
-project disclosure S.M.Greer
-deep space show Gaia project
-ancient aliens NG
-testimonies of excia agents, militaries and other (I have a list of over 30 but hopefully some of you can point out a new one for me)... One of my favourites is the declaration offline from Medvedev to a Russian journalist once said that, there is always the possibility that they are all crazy, delusional or manipulated but as we say in Spanish “when the river can be heard there is water running”.
If we are the invaders then it was pretty odd to be neanderthal invaders because that's our history. Plus if the former species were able to live under sea then they would of had enough technology or power to stop the invasion in the first place.