How would such a thing be possible?
Where will the "stumbled upon myth's" pollen come from?
IME f2 is not a market seed stage.
If you are talking about simply breeding with a myth, I consider it irresponsible (inhuman) not to peruse improvements.
Written permission is a marketing document to "coat tail" on a known name and reputation.
I have a seed in testing I call AKFire.
If it ever gets so popular that the word Fire is challenged in court, I will task my team of lawyers to take care of it, and marketing to spin it.