“Marvel’s The Avengers” is the big movie this weekend. The superhero ensemble flick reportedly raked in around $18 million at midnight shows last night. If you are not into comic books or you missed some of the other superhero movies like “Iron Man,” “Captain America,” “Thor,” or you just need a refresher on who’s who and what’s at stake — check out the witty guide on The Wrap called “‘The Avengers’: 5 Things You Need to Know If You Don’t Read Comic Books.” The post proves background on the bigger-than-life main characters and answers the important question of what is a tesseract?