Fake, Lara isn't in the game
Based on that tweet by the CD employee? No. That tweet was taken completely out of context by everyone. Long story short, the CD employee said there would be huge news for Tomb Raider to be revealed the following week and asked for any guesses. Someone responded by asking whether it was a possible reveal of Lara Croft in PSA, to which the CD employee replied with that infamous tweet. Everyone just read the last two tweets and assumed the worst. She wasn't deconfirmed.