I noticed Tseng being in the movie too and I was like WTF mate?!?

That guy got ripped a new one by Sephiroth. And later on Elena really acted like Tseng was dead, not just injured somewhere. Even Aeris is really saddened by seeing the vision of Tseng pwned by Sephiroth and she's supposed to be 'in touch with the Planet' and able to sense when people are alive or dead.... She certainly wasn't acting like he had much hope of living... And then we never see him again... But now he's supposedly alive? BS