I can't say for sure, but I think that
@Vernie822 was making a joke that the CM didn't know what month the preview parties would be, but since it's supposed to debut on 4/22, the previews would be in April. And those are the rumors we've heard - some variation on the days but generally that the previews would be the week prior to the 4/22 debut. I've only heard about previews for April, not May. I think Vernie822 was trying to determine if the April preview events would be available online (like a dining package), or just via calling in to Disney Dining - correct me if I'm wrong! Since they haven't even updated park hours yet, tough to know anything...
But again, anything is rumor and/or conjecture at this point (I feel that I must add that disclaimer!)