Yes.
So far, of the announced or released lenses, three have been primes and six have been zooms. (If I have counted correctly) While primes are popular on this forum, they are not nearly as popular among consumers. At best, I think prime lovers might see the continued 2 to 1 ratio of releases, but honestly, I am expecting quite a few more zooms before we see a lot of prime lenses.
If Canon releases an "x" body, we should see the 100-400 either before or shortly after. A 70-300 "L" would be logical since it makes a nice travel lens and would pair nicely with a mirrorless body.