EDIT: Thanks to Robert M for having pointed out in the comment section that there…
[Rumor] Will Canon Announce A New 400mm f/5.6L Before Photokina?
CR reports a rumor saying that Canon will announce a new 400mm f/5.6L lens before Photokina. Image Stabilization is suggested as one of the feature to expect.
EF 400mm f/5.6L price check: B&H Photo, Adorama, Amazon USA, Amazon Canada, Canon Canada, Canon USA [via CR]