Bought these the other day at a local card shop. I use to be so big into collecting these and sometimes playing them during the lunch break in high school back in the early 2000's. A company basically bought all the rights to them, redesigned them, and now have relaunched them. I bought 5 packs...I fear for my future lol
I still have all my character cards from the original series and apparently the newly relaunched stuff is compatible with the old cards.
Those are awesome! 
I need to find somewhere to buy these. Do you think that this would be easy to find at most card shops?
Card shops might be the right ones for finding them as they don't seem to have them at like Walmart or Toys R Us that I saw today. I thought I saw that these were kinda selling out pretty quickly for shops to get them, so it might just depend if they can actually stock them. I'm probably gonna grab a starter kit for 15 bucks and some more packs. My collection addiction is coming back lol
And speaking of collections, time to add some red to my Leonardo collection with this new turtle. As Pixel Dan pointed out, the toy looks kinda cheap visually mostly cause the cross hatching added to it isn't a paint thing, but put into the mold itself, which body wise, is uniform across all the turtles, but I still kinda like it.
