Capcom probably didn't like the fact that the game was leaked. They probably wanted it to be a surprise to fans. A lot of people wanted Claire. A LOT. And after what they did to her in RE6, and the fan backlash, this was the only logical move. I hope they can still get Alyson Court for VA if this is true. If Court isn't the VA, its just not Claire. Similar to how its not Chris without Roger Craig Smith.
THough I'm not sure why TRA Lara is in that boat when reboot Lara is being used for the next TR game.