As I've said earlier, it doesn't necessarily have to be the Skrulls for it to be a Secret Invasion but it could just as easily be the Skrulls having help from another alien race if numbers are your issue with the idea
Just spitting out an idea LOL, since Marvel haven't said anything (to my knowledge) about a Secret Invasion 2 than this is just speculation at this juncture.
I heard this is what was planned but the backlash in some areas made them rethink
I don't think it was even supposed to be an event out of the cap books iirc so I'm not convinced
but it sure felt the same
it read better to me when I read it in trade but it, imo, was a very bleak story that felt like dark reign
yeah, Spencer didn't really take advantage of the huge opportunity to tell dark reign-esque stories. There was an actual Dark Avengers title during Dark Reign; along with the various tie-ins and minis. I would have loved to see more of Chthon-Wanda and evil-Vision; personally.
Probably because there was so much backlash as it was against Captain America being the villain, and not just the villain, but a villain serving, and then leading, an evil organization that splintered from the Nazis, whom his creators intended to rebuke when they came up with him. That being said, I would have loved to see Avengers #10 (the HYDRAvengers issue) used as a springboard for a HYDRAvengers mini depicting how they established themselves, how they were recruited, and stuff like that. That would have been pretty interesting, and if Stevil ever gets broken out of that extremely secure black-site prison he's in now, he could probably assemble a new HYDRAvengers team that would be even more of a dark inverse of the Avengers.
The spider is always on the hunt.