I actually think CJ could be cool. At least they're doing the series justice with their character designs and models. What bothers me is how you just know that this game won't have a good online component. Instead of something that players want - like, say, one-one-one online fighting, like 99% of all fighting games these days - you'll get something like the ability to trade items over WiiConnect24. GREAT
Also, the PS3 has a lot of great exclusives aside from MGS4: Resistance: Fall of Man, Warhawk, Gran Turismo 5 Prologue, Super Stardust HD (PSN), Ratchet and Clank, Motorstorm, Echochrome (PSN), Ninja Gaiden Sigma, MLB 08 The Show (best sports game this generation), and maybe a couple more. The whole "PS3 has no games" stuff has been invalid for a while, yet people still perpetuate it. Maybe these games aren't some people's cup of tea, but they're all critically-acclaimed. You could bring them up to defend the PS3 just like people bring up Zack & Wiki and No More Heroes on the Wii.