Great post Uni. I myself don't like to bring up a ridiculously powerful version of Supes. What choice does one have when people bring up ridiculously overpowered versions of characters they like?
I agree with most of your post, but that is what people bring to the table here.
The one thing I semi disagree is LT's position, as the basic all knowing guy of Marvel, seeing Thanos assembling such a powerful artifact should have set off a red flag, don't you think? He should be able to see the future and many alternate realities.
Then letting him get the HOTU was even worse, you don't let a convicted child molester around your kids... why not just strip Thanos of his powers?
To answer your question about where T-VO came from, it's actually a kryptonian battle technique. Thing is, Krypton went the path of science so it was rarely ever used since there was no real need for it.
The first time Erads battled Supes even he (erad) admitted he was not
a fighter since that was not normal on krypton.