We've looked into licenses - 50-75K plus a piece of each game is pretty normal.
The Farsight stuff seems about right - remember they don't Kickstart original theme B/W games, just the ones that were licensed at the time and have since expired. By pre-selling enough to cover the license cost (ie, the costs above and beyond a normal pinball port) they ensure success.
Addam's Family was always going to be expensive - Raul Julia is dead and the movie itself had a nebulous production / rights issues (started as Orion, ended as Paramount, based off earlier license, etc)
If someone had made a Big Lebowski pinball after it bombed it theaters they could have gotten the rights for a song. But now it's a cult hit = expensive. Same thing will probably happen with Army of Darkness, should someone go after it. There's an Evil Dead show coming with Bruce Campbell, which will make the old movie more desirable now.
Likewise, best time to make a Firefly pinball would have been right after Fox cancelled. But now Joss Whedon is An Even Bigger Deal so those rights will go up as well.
The moral of this story? If you're a middling success in Hollywood, direct ANY Marvel film and instantly became AAA list.