I think this league will have more staying power for a number of reasons. First, better TV contracts with other companies that don't have NFL except for Fox. Second, the old XFL was primarily a built to be a live show event, not a TV-geared show. VMac wanted it to be more like wrasslin vs. a legit football league. Third, and it kind of ties with reason two, they made a lot of rules and new things to gear it towards TV entertainment. It will be entertaining, guarantee it.
Some of the new things not already listed by
@Yukonwreck: every player has a radio in their head...where they can talk back to the coaches! TV producers will be able to tap into those feeds...live. Even further, I believe more than one coach will have the ability to talk to different positions or players.
Rule changes will make it more exciting.