Canon EF 200-400mm f/4L IS 1.4x Announcement Matter Of Few Days?

It is getting chaotic. After various rumors about the release date of the EF 200-400mm f/4L IS 1.4x, one said May 14th the other postponed everything to 2014, a new rumor surfaced and appears to confirm the announcement in May. Beside May 14th (i.e. tomorrow!), the 31st of May is also a possible candidate. In any case, the rumor says there will be a limited supply for the first weeks.