They don't need a new logo or anything, I like both Bandai and Namco's logos.
Although, I dunno, I figure the 'A' from Bandai can be used in namco, and the small 'n' in namco could be used in the Bandai logo. Maybe that would look okay? I don't have photoshop, but the two that were proposed are utter shit.
It amazes me that people from these companies can make Gundams, Katamari, and Soul Calibur but not be able to make one decent looking new company logo.