This was in the mouseplanet update this morning. Confirming that there is going to be the HM holiday overlay but no merchandise event.
Ever since it was first announced that Haunted Mansion Holiday would, for the first time, not be having an accompanying merchandise event, the Internet has seen the rumor circle the globe in waves that Haunted Mansion Holiday itself was canceled. Honestly, take the graphics on the recent news about how a global bird flu pandemic would spread around the planet and replace the little duck graphic with a small X'ed out Jack Skellington and you have the idea.
Anyway, the rumors were back this year and have reached the point that Walt Disney Event Services has gone to the extreme of announcing a non-event. Specifically they say that because of all the pirates hoopla this summer there will be no Haunted Mansion Holiday event but that the attraction will definitely be returning.
So, the next time you see someone post, "I heard HMH isn't coming back this year, anybody know why?" you will know what to post in response.