Also I'm with @jrd617 on the release date for BvS. A year and a half is a very long time to finish a movie. The date was picked for strategic reasons. Nothing wrong or shameful in that. It's smart business.
If these rumors are true about Marvel and F4, you really are placing the blame on the wrong feet. Don't forget who owns Marvel. The House of the Mouse. The CEO is well known for being crazy about things like this.