Viking horns would stay
- no one cares about historical accuracy or realism when it comes to sporting logos
Actually they do, the historical implications and the accuracy of names like the Redskins, Braves, Sioux, Chiefs, etc, has been brought into question in the US and Canada, though i think that at their core those arguments are fundamentally stupid and only exist as a political narrative (and bludgeon) and I'm not proposing them here.
My argument is purely one of aesthetics and what the visuals a Gjermundbu helmet and an horned helmet convey, and simply put the horned helmet is a caricature that every sports club using a viking theme uses and we should move away from it simply cause of it's saturation in our field and cause of the image it purveys to the viewer.
I defy you to find sports team using a logo with a Gjermundbu helmet in it's logo (I can find only one sports logo with that style of helmet, and it's a concept that isn't even in use), basically every team called the Vikings has a horned helmet in the design.
A Gjermundbu helmet is unique in our field, it's memorable, and it looks good, it can easily be used to create an aggressive image (as I'd be aiming for), so basically it's the perfect image to build a brand around.
- you can sell plastic Viking horns
- if you want a bit of realism, replace the Viking clap with a good ol rape and pillage
Firstly the Raiders don't sell any official viking helmets or any viking style merch at all anyway (I know it's a missed opportunity, but it's actually because of the NRL's rules around independent merchandising I'm told, basically the NRL handles all the merchandising apart from game day and on-field kit and all their merchandising options are universal items and can be brought in any of the clubs colours/motifs, it's against the clubs NRL license to sell any merch independent of the NRL without their go ahead, and apparently rules similar to these current ones were one of sticking points that lead John Ribot and the Broncos to conspire to come up with SL) and you can sell plastic viking Gjermundbu helmets anyway like this one-
https://www.britishmuseumshoponline.org/viking-plastic-helmet.html.