Legion of Three Worlds is decent enough comics, but fails on the count of Too Much Superboy Prime.
Superboy Prime sucks and is a bad villain. If he were a professional wrestler, he would be X-Pac – he isn’t the guy you love to hate and the guy you want to see the good guys beat, he’s just the guy you want to go away forever. And whatever Geoff Johns’ strengths as a writer (and they are multiple) are in evidence in this comical-type book, they are unfortunately matched by one of his great weaknesses, which is thinking that Superboy Prime is a really, really great idea when in fact Superboy Prime is the opposite of that thing.
And what’s worse, half of the fucking book is told from Superboy Prime’s point of view! (That would be “the less fun half.”) Between this and the notion that the Legion of Super-Villains was inspired by him (which makes me gag both on the “every twentieth-century DC character is inspirational forever and ever” front and the “Superboy Prime, really?” front)… well.
But the Legion parts of the book are generally fun, even if Johns does write Lightning Lad something like Wolverine with the batteries plugged in. And Perez art is always good because George Perez can do no wrong with me. So mixed grade, leaning to thumbs up somewhat.