We don't know that 2K can do yet. Last year's game was a THQ/Yukes game with 2K's name on it.
2K has extended the cutoff date that THQ set for Wrestlemania. They could have potentially extended it to a month or two before the game is released.
There was a rumor that 2K was going to have something similar to weekly updates.
The biggest difference is that the developers have to build each part of the superstar separately like the boots, shorts and shirts. We don't have to do that.