There are so many good characters in the public domain. I would love to see FFG create a sort of "multiverse" LCG using some of those characters.
Imagine Zorro fighting alongside Tarzan of the Apes against the beasts of Dr. Moreau.
Or Conan the Cimmerian aboard Captain Nemo's Nautilus in search of Moby ****.
Or John Carter and Sinbad the Sailor on the trail of Jack the Ripper.
There are so many good characters that are free to use. Some of them have so much history, you could create a game just with that one character. Fantasy Flight has done such a great job with the Cthulhu Mythos (also in the public domain), I'd love to see them do the same for another free IP.