Hope he can manage this and desn't damage bitcoin's image. His business would be a opportunity for bitcoin too.
About Megaupload 2, as far as I know the website is going to be called "K.im" and honestly, it sounds like a promising project, though its success will be based on how many people are willing to pay for content that they can find for free online since this website is going to be a file hosting service and will be used for piracy.
It could definitly help Bitcoin become mainstream, since the site also includes the option to monetize files using Bitcoin micro-transaction as payment. imagine YouTube creators or indie musicians using this website, it could be a game changer. But unfortunately Kim Dotcom has stated that the site will go live after the ICO so...yeah.