So I found this on wowhead (https://www.wowhead.com/item=128323/6-0-weapon-axe-2h-gorehowl-d-01-hd-remake-grom-hellscream-only#modelviewer)
And that is an updated version of gorehowl that was never used except for grom i think anyways, I looked at that and thought "Man that would look so sick on my mag’har orc. So then came my genius idea. Lets take a page out of demon hunter azzinoth book. So my idea is this. That you’ve unlocked gorehowl from karazhan tbc as a transmog or even more hardcore that you have it in you bag for this next part, so next part is that they add Hellfire Citadel as the timewalking raid for WoD timewalking event, and when you’ve rescued Grom you unlock its apperance or maybe even after defeating Archimonde.
A little sidenote idea is to maybe make it warrior only or somthing but I dont know.
Please leave your feedback and ideas underneath and hopefully we can get the devs attention.