While there's no news of the upcoming 5D replacement, there is a 50D in the works... Screen shot of the website here.

EOS 50D Specs:
Sensor: 1.6x crop CMOS
Proc: DIGIV IV
MP: 15.1MP
LCD: 3" VGA LCD
VF: 95% viewfinder .97 magnification
AF: 9 point af
ISO: 100-3200 (Expansion to 6400 & 12800)
FPS: 6.3/3fps
Buffer: 16 RAW - 60 JPG - 10 RAW+JPG
Feature: Dust Reduction
Feature: Auto Brightness Processing
Feature: Microadjustment
Feature: Face Recognition AF
Feature: HDMI Output