For those who don't get it or haven't heard.
.yeah, he's red now. As it says, this change is tied in to something with The Red; the biological force of animals.
If it works out all right, and he's still the same Beast Boy on the inside, then great. If not, well, at least he got a happy ending in the pre-52 DCU.
Beast Boy, Teen Titans © DC Comics & Warner Bros Animation