This move pretty much makes him an outright liar, since last month he said, "There were the very early conversations and I quickly said that because of my loyalty to Star Trek, and also just being a fan, I wouldn't even want to be involved in the next version of those things. I declined any involvement very early on. I'd rather be in the audience not knowing what was coming, rather than being involved in the minutiae of making them."
I'm not going to trust a single thing he says from now on. Harrison IS Khan.
Remember when George Lucas said there would be no Star Wars sequels, even after his death? $4,000,000,000 later he's changed his tune.
Everybody has a price.