Rule number one in trailers - don't falsely advertise the movie! If you propose this spiritual opening/coping of Will Smith then give us that. Do not give us a con job by Will Smith's friends where you are more excited by trying to outsmart the viewer instead of just giving us what you advertised. Very disappointing. So much so that by the time they actually got to the feel good spiritual ending you can't enjoy it because you are too annoyed.
I wouldn't really recommend anyone bothering with this. It was a major disappointment.