I will wait for the DNA test.
Just exactly would you expect a DNA test to prove? Paul's only (known) kids are spiritual, so other than possibly showing the bones are Semitic, no way DNA would be helpful at all.
Ain't gonna happen. Also, the RC Church has an interest in NOT opening the coffin, just in case its empty.
Besides, even non-Catholic I would object to disturbing the great Saint Paul's remains--until the Resurrection!
The archological evidence sounds pretty good. It's not implausible at all that 400 years after his death the Roman's could reliably identify Paul's grave.