These things happen naturally. It’s been done to death but we just have to accept we don’t really have one. If we started playing FMTTM before every match it would feel contrived and not at all like YNWA at Anfield which is basically what most people want to emulate, or an old folk song like Blaydon Races. Even Man United don’t have one.
We Shall Overcome has barely been sung since 2004, I bet we have fans in their mid/late-20s who don't even know it or its loose connection with our club.
Power Game was the Ayresome pre-match tune and I think thats what it will remain. I have strong memories of Centerfold (J Geils Band) at Ayresome being sung by the crowd, but hardly like it caught on as a proper anthem.
I actually thought Steel River may be played more after the Brighton match in 2016, but it wasn't. That was the point at which it could have caught on organically.
Reach Up (Perfecto Allstarz) is the closest thing we have to 'an anthem', even if not everyone likes it, it is sort of synonymous with the Riverside era and thecrowd did actually embrace it unanimously for the first few years at the Riverside, hence why it has stuck.