But... I like skanky Lara clones
And having two playable characters would make the gameplay more varied. If they stick with Elena they could have some Dead Rising type of photo/filming sections. Or they could make whatever girl they choose have different abilities than Nathan. The girl could crawl through tight places and go different routes through the ruins etc, and they could help each other out like in Lost Viking. It would be fun.
I was actually waiting the whole game to get to play as Elena in the first one. She was there all the time, shooting and filming, but you could never control her other than during the jetski sections. Missed opportunity in my opinion. Could have made the game both longer and more varied.