I think it's an opprotunity that WB would be stupid not to exploit in their current position. As someone said , it would be no problem to film it at such an angle that all you see is a chair level view of a guy sitting at his desk, typing. Someone off screen says "Kent, Chief needs you!" or something along those lines. The guy gets up and walks off, the camera turns slightly to the left and we see the name plate on the desk says "Clark Kent". Cut back to outside, where the ring is hovering, as if scanning to see if he'd be a good candidate. It decides he's already got plenty of his own brand of superpowered butt-kickery, so it flies off, continuing the search.
You wouldn't have to see his face, you wouldn't have to hear him, you'd just know exactly who it was and why he was passed over. And while it won't neccessarily bring in more viewers, everyone who does see it will squeal just as much as they did when the reporter said Superman was seen in Gotham in Superman Returns. And with the WB on theverge over getting taken to court if they don't get another Supes film going soon, and worried if Superman still interests people, not only is this a good way to gauge whether people are still excited by him and Returns just got it wrong (duh), but it will get people buzzing about him again. I garauntee people will come out of the theatre not only happily suprised that he was in it for that short time, but half of the crowd will be expecting a superman movie next in line, and then think think that the ground is being laid for a Justice League movie just like Marvel is doing with Avengers. It's a win win situation. If people don't bite at that little tease, then they know they really have a situation on their hands. But if they do (which, why wouldn't they), they know all hope is not lost.
It just puts WB in a situation of having to have a script to move on with Superman. But with Geoff Johns and Grant Morrison on board the film division now (2 men responsible for arguably the best Superman stories in a LONG time with the work Johns has been doing with Gary Frank in Superman and the Legion and Superman Brainiac and their upcoming Superman origin, and then Grant Morrison with All Star Superman), I'm positive that they can make something happen. At least I hope...