Allah (SWT) alone is knower of the unseen. Muhammad (SAW) knows of the unseen only that which is disclosed to him (via Revelation) (7:188, 46:9). 72:26-28 states that Allah (SWT) does not reveal the unseen to anyone except to whom he chooses as Messenger. The unseen there is specified in 72:27 to be the Message (Qur’an).

Why do you uphold the ahadith "prophecies" (affecting your decisions in the argument against "Qur'aniyun")? If Muhammad (SAW) was given the Qur'an and something like it, can you produce it such that it surpasses the Qur'an (since that is the challenge)?

Peace.