Currently, Canon EF 200mm f/2L IS USM lens is not in stock at most stores in US, so this is a notice that the EF 200mm f/2L IS II USM is coming.
And we also reported that the EF 800mm f/5.6L IS II will be announced soon. This new version would be much lighter than the old one.
About the release date:
This two lenses could be announced after the announcement of Canon EF 200-400mm f/4L IS 1.4x.