I think, personally that a D'Lo Brown return wouldn't be a bad thing at all, especially considering the recent events that have gone down, I mean look at it,
firstly you've got the number of injuries that have ravaged the company recently. Most of the main event scene is laid out with injuries, and Smackdown! has become nothing more than a joke recently. Putting in somebody like D'Lo who can work on Smackdown! or ECW, would not enhance the main event scene, but would help things as a worker who can really work, to teach and put over the newer guys who are on the stepping stones to success.
Secondly, the company is lacking in star power thoroughly, I mean you only have to look at Smackdown! with their 3 top guys as Khali, Batista, and Kane. Although Kane is a veteran and can work in the right environment, he isn't championship material anymore, he's put on weight, and is getting slower, and isn't over as a title holder, and nor would he be. Batista had his moment, but his act is old and he's been given too much exposure...fans are losing support for him fast, and he can't work. Khali is the worst of the bunch...this guy shouldn't even be on T.V....his matches are some of the worst I ever seen, he has NO personality/gimmick, and the fans just wish he would go away....no matter how hard they push him, he will never be a main event calibre performer, or over with the fans. Adding D'Lo in to help the young midcarders, might just help create faster stars, so Smackdown! will have a new main eventer or two, hopefully just that little bit quicker to take over from these three, and that coupled with the returns of Edge and Undertaker, might just save Smackdown!
It would be a good move for both parties, as D'Lo would pick up a pay-cheque, and the company could use his strong points to their advantage. However it should be noted, I don't think he should be pushed as a main eventer, he isn't over with the fans enough, and doesn't have the mic skills or finishing move to get really that over....but his skills in the ring are of paramount importance, he'd play a role similar to Finlay, in my opinion...be a performer who isn't considered a title chaser, but is excellent in the ring, and can teach the younger guys something.