The Dallas Mavericks are a very different team than they were a year ago. Last summer, they wanted to continue riding the wave of their recent Finals appearance, so they signed Klay Thompson from the Golden State Warriors. While Thompson was serviceable, he didn’t do much to change the fortunes of the franchise. There’s a world CBS Sports writer Jasmyn Wimbish explores if the Mavs signed LeBron James from the Los Angeles Lakers instead of Thompson, and it changes everything.