He should, and very likely will, but I don't want to be disappointed, so I'll acknowledge the possibility that he might not.
All those aspects combined should amount to "probably".
Well a couple of things I remember for why he probably will come back:
1. His story implies he actually was wanting to defeat Shamrock, and mistook him for Shanks
2. His railgun has Punk 07 on it when there are only 6 Vegapunk sattelites
3. His attacks are named something Punk and he already has the number thing
4. No reason he should die other than just wanting to see brutality for the sake of it which I don't
5. His crew has a woman in it whose teeth look like fishman teeth so she may save the crew
6. He was not defeated by Shank's attack alone but by his explosion too, divine departure doesn't cause a big explosion
7. His ship was destroyed near Elbaf, and that's where Vegapunk, Shamrock ( was ), and the ruler of the celestial dragons are, which he all has an implied connection to ( with celestial dragons in the sense that he had a quote about it at Sabaody )