Well PvP mount is there to be earned forever (the vicious saddle ones)- the Tmog is the only real thing you can show off.
You can earn those PvP mounts long after the fact, unless you’re talking one of those gladiator dragons- nobody gets those, period lol.
Like, 0.05% of an already dead playerbase that does PvP… basically no one but the wintraders, lmao. I’d just ignore that reward at that point.