Had asked about Belfast next year at the end of this year's event and was told it was happening. As it's not up yet either, it's safe to assume not all the regional cons have been input yet in the Upcoming Events section.
Not all the regional events for next year have been released. Only the 1 so far. I'm sure @Queen_Sindel would agree that the remaining are being fine tuned before being input in the Upcoming Events section.