The story is akin to the old WWE games as well, it's mostly the same story but you can pick any wrestler or CAW to play through it with paths that can differ so to play all the stories you'd have to do multiple plays.
I'd say it's worth it for $10 but it really depends on what you want, it's a blast to just pick up and play with friends but it's severely lacking in game modes and creation suites. I quit playing before they added things like Stadium Stampede as well so not sure how that helps the replay value