This sounds pretty wild, actually. I'm down. I like the characters involved and appreciate the ones who rarely get attention like Power Girl, the creators are good, the premise is weird and fun, and I like the idea of a supernatural natural disaster. A Lazarus pit erupting is a cool idea I don't think I've ever seen before.
These are the kinds of Events I want to see more of; different things, different characters, not messing up the pacing of the books I'm already reading (far as I saw anyway, it's all one-shots right?), and over quick.
When I first heard "Lazarus Planet" I had zero interest, but I'm gonna check it out now.