Smallpeak is just starting a new roumor thread because he/she is a bit bored. I can hardly believe there is anything behind those statements. Anyway, a few points.
The new pro cam will NEVER be called E3, all E-system cameras have a hyphen in between the E and the number. This is imediately displaying the lack of facts behind smallpeak's thread.
IF and only IF it will be called E-3 smallpeak is hardly the one who knows. Personally I am convinced it will not be called E-3 because the number 3 would associate too much to the 3xx series, which I believe has come to an end. Just have a look at the E-4xx and the E-5xx or the mockup of the E-x. There is not one single indication of a contiuance of the E-3xx shape. Conclusion: it cannot be called E-3. My guess is E-1n, E-2, E-4 or E-5, but as I said, this is a guess also.