Prob better than him losing to Orton @ TLC and disappearing back into the mid-card until like May '10 at the earliest. At least this would give him a big time WM match.
He needn't be out for the entire 6 weeks anyway though... Just keep him out of Orton's reach in terms of 1-on-1, until all attention (most importantly, Orton's) has shifted to the Rumble. Remember, the storyline so far is that Kofi has evaded Orton's attempts at revenge and following said attack, Orton should be feeling vindicated having injurred Kofi in retaliation for getting involved in the Iron Man Match).