For sake of argument, call Jones undefeated.
Thinking that Ronda Rousey will remain unbeaten. Jones will likely be able to defeat Cormier should the two compete at the end of the year or early next year. Jones will move up to heavyweight next year and likely take on Cain Velasquez. Cain is a 3 to 1 favorite and will likely take that fight. Chris Weidman is undefeated but will have a tough test in Vitor Belfort, but if he gets by him he will have to fight Machida. Machida's style is bad for Weidman and Machida will likely get the W in that bout. So that pretty much just leaves Ronda as the only major fighter to be undefeated in her career.
Source: MMA Facts