Many thanks to staf4ek for sharing three photos on instagram. Two of them are of Keanu in workout clothes and the third is of Keanu after he had changed into his regular clothes. Photos were posted today and appear to have been taken outside of a training facility. In the lower left of the photo, you see the back of someone with multicolored hair. It’s possible that it may be Lana Wachowski and if it is, then training for Matrix 4 has begun.