If this is real, I hope they give our teens a lot to do. I don't want this to be a repackage of University. Sims 4 did University the worst out of previous versions. High School is very different. At minimum, they would need to give us a new event type for school dances. It would be nice if you could plan a school dance to make it either winter formal, homecoming, prom, or even a Sadie Hawkins deal with matching outfits. It would be cool if they brought back the photo booth, too.
Sleepovers need to make a comeback. I like what others have suggested about skate parks and bands. Maybe this could be a way to introduce cars into the game? Or maybe add more sports or hobbies. I still want arcades. I could also see them adding malls to the game, but teens don't really flock to malls like my generation did. They should make some of the part time jobs playable. Babysitting would be a nice playable job. I'm not going to get my hopes up on too much. Sims 4 rarely delivers because they split up DLC to the point of making it lame and disjointed. If this pack is real, it could be really cool or a complete waste of money. It's an expansion pack, so they need to go big or stop asking us to pay EP prices for what is clearly a GP.