One possible problem I see is that there will be friction with existing SciFi.SE site for literature works in speculative fiction realms.
That friction can be detrimental to the new site, in several ways. I can think of two off the bat:
Any questions that are SFF works related, are at risk of being asked on active, large, established site (SFF) instead of smaller Beta Literature site.
This is (likely) good for the asker's chances to get a good answer, but bad for Literature's volume/traffic/userbase growth.
Somewhat in similar vein (and a corollary of the last one), it seems that a large portion of traffic is likely to come from people interested in new, popular works. For better or worse, the most popular ones and the most likely to attract external traffic are SFF ones (Harry Potter being a good example) - which as per above are at risk of being heavily weighed towards SFF site when choosing where to post.
Are these real concerns or am I just being a worrywart? If real, have anyone come up with meaningful ideas to address such concerns?