StokerCon 2020 (mid April 2020) is in the UK and has an academic off-shoot, the Ann Radcliffe Academic Conference. The abstract submission deadline is 31st October 2019, and “registration to StokerCon 2019 is required for to be accepted and to present”. No special theme other than “horror studies” in any media, but they expect papers to take an “interdisciplinary approach” and offer a list of academic disciplines to get inter- with. It sounds like it’s more for grad students rather than independent scholars, but I thought I’d mention it here anyway.