I would hope that Kodak wouldn't just play on the name for sentimental purposes like Ford "brought back" the 5.0 in the Mustang... just another modular motor.
Kodachrome is inherently different and that is why it looks and acts so differently. It's an additive process where you put dies in after exposure. It's otherwise essentially just a 3-layer B&W film.
E6 is a subtractive system where all the dye needed is in the film and you take out what you don't need during processing.
E6 will never have the same color, density, contrast or "sharpness" that the Kodachrome processes had and certainly not the image stability/longevity. Just the very nature of the Ektachrome system is susceptible to color shifting and far less density/contrast. I love Velvia 50, Provia 100 and E100... but not like I loved Kodachrome. It was a total B$@%D to get right, but when it was right... it was so right!