The Beast incarnated
As soon as he made his return, Brock Lesnar made it clear that he is going after the title. With the sheer star power that he possess there is no question as to whether it would be a good decision or not.
However, currently as things stand, Lesnar is not even in the title scene. The Authority has refused to grant his wish which leaves Lesnar wandering for answers. At this point, him playing interference in the Elimination Chamber post match scene is the most likely angle that will put him relevant in the title chase.
If Orton wins the title at Chamber, the attack angle involving Lesnar would be blown off as Orton would receive the least sympathy possible. A match between Orton and Lesnar would also be less intriguing as the classic face vs. heel scenario will be absent from the situation.
Thus any of the face winning the Chamber would be the best decision for business as it also opens the doors for the company to change Batista into a heel.