9 weeks to promote a fight and train? Possibility of an injury, getting beat... Do you seriously think Wlad would fight 9 weeks later, no way. I think the other issue is the WBA aren't going to agree to waiving the mandatory challenger when the fight looks unlikely to go ahead on that date, not to mention that he could lose the fight he has in the meantime...
Derek Chisora wont even be a full workout. Wlad's just as likely to get injured training, like he did. Lots of champions have defended 9 weeks apart. Anyway, if Wlad's taking the **** now, Haye deserves it.