The Excel flights ARE going ahead, there will be an announcement around the 19th. The deal was only finalised last week, so negotiations WERE still underway when the flights went on sale at the freedomflights website. Flights would not be put on the website 'by mistake' this would be highly unproffessional.
Excel have asked HUY to hold off with the announcement, probably to give the Cardiff announcement it's air time.
Jet2 will have been put off by the based XL a/c, it is a pity, but HUY will continue to offer niche services. Next year HUY will have more charter destinations that LBA and MME.
Regards
Mike