So, why is every hero added “Legendary”? Yes, I know its because of marketing and price… but come on…
Blaze is legendary, but Diablo isn’t. Blaze is random nobody from SC, who recently was revealed to be heavens devil and works with Tychus, while Diablo is lord of terror, prime evil, main villain in diablo lore, series which is named after him.
Just remove those awful marks, if you won’t make them relevant to characters, make all new ones cost 10k gold and be done with it.
At some point, certain heroes are demoted from Legendary, to Epic. Like Gul’dan, Alarak, Ragnaros, Li-Ming and Lt. Morales. Not sure if I’ve forgotten any.
As you can plainly see, Lore has nothing to do with it. Probius is Legendary, but a made up char. It has no identity in Starcraft. Just being a random probe.
“Since his activation, Probius has always wanted to prove himself. He may be small, but he made a big difference by warping in a critical pylon during the retaking of Aiur. As the bravest of probes, Probius is eager to fulfill his purpose in the Nexus”
Quite likely an intentional afterthought. The cinematic was released on September 13, 2015. Probius was released in Heroes of the Storm at March 14, 2017. They likely wanted to do a Probe-hero, and figured that this specific Probe would be a good reference to make - and so they did.
Either way, there isn’t really anything left to discuss in the thread, is there? Arbiter seems to have thought that the Hero Rarity had a connection to their Lore, but it is as both you and Chevron says:
Should it be? No. It’s perfectly fine that the Rarity is based upon how new and/or complex a given Hero is.