Nope, it will just be a bonus stunt saber in the box. You'll have to guesstimate on the blade color. I've seen a few Apprentices in the free Initiates, but a lot of the ones I've seen over the past couple years have been the Initiate (and Dark Initiate) V2. Mystery boxes have some writing on the paper, I've seen it in peoples' videos. If it comes with sound, it comes with an extra paper saying what sound module you have. But, that's about it.
Pretty much, free sabers are like grab bags, you'll never know what you'll get unless the model is specified but color-wise, it's a guess.