Sounds like a lot of scientist have been reading the Three Body Problem.
I think we should worry more about AI taking over rather than aliens. Its actually much closer to home. On the other hand the only alien intelligence which has the luxury of interstellar travel is the one which has no sense of time and that would be alien AI again.
The Three Body Problem and ASI are two songs on the same instrument: value misalignment in cases of massive power differentials.
In an indifferent universe, two optimizers optimizing different things will be in conflict. Can we build machines that optimize what we want to optimize? Can we align our optimization with aliens before it becomes optimal for one of us to annihilate the other?
I think we should worry more about AI taking over rather than aliens. Its actually much closer to home. On the other hand the only alien intelligence which has the luxury of interstellar travel is the one which has no sense of time and that would be alien AI again.