Q: Will the iPhone 7 have 3D Touch

Yes.

http://www.apple.com/iphone-7/

3D Touch. Now even handier.

When you use 3D Touch, your iPhone responds with subtle taps. So not only will you see what a press can do — you’ll feel it. The new Retina HD display on iPhone 7 deeply integrates 3D Touch throughout iOS. Now you can interact with Messages, Calendar, Mail, and other apps in a more powerful, more responsive way.

Here is what Apple has released about the iPhone 7. http://www.apple.com/iphone-7/   And yes, it will have 3D Touch.

Yes