Daniel Bryan needs to get healthy in a hurry. Twenty-seven days from now, the reigning WWE World Heavyweight champion will have to defend his title against Kane in a Stretcher match at Money in the Bank, per WWE:
However, if Bryan is unable to compete, the Money in the Bank match at the pay-per-view—which is normally for a contract for a title shot down the line—will be for the championship itself, per WrestleZone.com:
Kevin Sullivan, author of WWE 50, thinks that fans might prefer seeing the MITB match for the WWE World Heavyweight Championship rather than Bryan vs. Kane:
Once Bryan refused to surrender the world title to Stephanie McMahon at Payback, it was clear that the company feels his recovery from neck surgery is going well enough that he can make a return to the ring relatively soon. There would be no point in him carrying the most important championship in the company were he to remain out of action for a lengthy period of time.
Although some fans will be upset that Bryan's next opponent is Kane, the choice makes sense. With so little time before Money in the Bank and Bryan still injured, it would've been impossible to create a compelling program with a new wrestler. Kane and Bryan go back a long way, and this match furthers Bryan's rivalry with The Authority.
Money in the Bank can be more of a transitional event in terms of the world championship picture. Bryan defends his title and proves that he's healthy enough to compete. Another Superstar can then step up as a challenger for the title, and that feud can run through the rest of the summer.
At this point, fans should simply be happy that Bryan has set a date for his return, considering how grim his prognosis looked (per Marc Middleton of WrestlingInc) a few weeks ago.