New rumors seem to confirm the growing evidence that the Canon EF 100-400mm f/4.5-5.6L IS II USM lens will be announced later this month and serve as a replacement to the old 100-400mm model. Digicame-Info, which is notoriously accurate with leaks, confirmed the model name of the new lens above as well as the lens hood as ET-83D.
The rumors further state the lens will be announced soon. Previously, several rumors pointed toward November as the announcement time frame, and that appears to be the case now. Expect more developments in the next week or two.