I would preorder if they were all cardio, but it looks like there will also be yoga (don't want), barre (not interested...I don't think) and weight workouts (have enough already) in the mix, which makes it less appealing to me.
I was hoping for a group of low-impact/high-intensity cardio workouts (or maybe some cardio/weight metabolic circuits) when I first saw the annoncement.
I may end up doing what I did with the last presale and only getting some of these.