I'd like to see Wlad-Toney too, but honestly Toney is still too ring rusty to face Wlad now. The 3 rds agaisnt Rahman weren't enough after the long lay-off. He needs 1-2 good fights first, some good pro rds under his belt, to keep his weight down and shake off the ring-rust. Toney is best when he fights often, also this would enable him to get ranked with the boxing bodies again.
Regardless of your feelings towards Haye, are you not intrested in someone who is at least partially exciting and possibly very good for a stagnant division.
Not until he actually fights someone worth of notice. If Klitschko beats him up right now, he will get absolutely zero credit.