Mishihari Lord
First Post
Elminster, Raistlin, Drizzt, Vecna, von Zarovich, Tiamat, Lloth, Soth ... there's plenty. Lots of D&D books hit the bestseller charts over the years; people read them. Who knew about about Star Lord before GotG? I didn't! I didn't even really know about Iron Man before Marvel lucked out with Robert Downey Jr., which is what launched their current trajectory. I'd never heard of Black Widow or Hawkeye.
And those are pre-existing characters. It's perfectly possible to launch and succeed with a brand new character. All characters were new once. Jason Bourne was brand new. So was Jack Bauer. Felicity Smoak is a new DC character launched by the Arrow show, and now in the comics.
Luck and marketing. Though I might have said that a few times already....
Marvel led with Spiderman and DC led with Batman and Superman, whom most non-geeks know. Once they had established that they could make movies worth watching they moved on to the minor characters. This was good marketing, not much luck. D&D doesn't have any characters of such stature.