Grant Morrison wrote an "afterwords" to the first issue. From that, iseems like the story will be "What if a superhero could hear all the crap people say about him on scans_daily and had the maturity of a 12 year old?"
Fixed that for you. The real Superman would merely be disappointed with how fake Lois and friends acted, leave, and try to build a new life elsewhere. He wouldn't guilt trip them to death.