Tanveer, I think the idea Prophet Muhammad (may Almighty Allah bless him and his family and grant them peace) was trying to preach is that Almighty Allah will not create any religion after Islam and He won't send any prophets either. If any religion comes after Islam and you think it's the truth, remember what I tell you and know that it is not from Almighty Allah, but from Satan, the accursed. And Almighty Allah knows best.
Brother There is only One God, please keep your thoughts to yourself. You will never know the amazing feel of being close to Almighty Allah and his Prophet (may Almighty Allah bless him and his family and grant them peace) until believing and following the Hadith's. I know, you might refuse to do so and your heart might be hard, but remember how you used to look at Islam before becoming a Muslim and how you look at Islam now as an adherent of Islam.