Similar to the Krillin mistake. In the beginning of the opening of the game it features Vegeta in his Saiyan Saga outfit fighting Goku. Source for that:
https://www.youtube.com/watch?v=rMZjO96DxLs
However, Vegeta doesn't have this as an alternate costume in the game. Source for that: https://youtu.be/CEZLQFhtCqY?t=1m38s
And here is proof that this is Vegeta's Saiyan Saga outfit: https://www.youtube.com/watch?v=_1LjUQnd8es
That's all for now.
https://www.youtube.com/watch?v=rMZjO96DxLs
However, Vegeta doesn't have this as an alternate costume in the game. Source for that: https://youtu.be/CEZLQFhtCqY?t=1m38s
And here is proof that this is Vegeta's Saiyan Saga outfit: https://www.youtube.com/watch?v=_1LjUQnd8es
That's all for now.