I think this could be an interesting plot device if you were to have Miz come down and cash in on Kane after the Undertaker interferes. The refs assume that it's legit and go ahead with the match. The Miz could beat the injured Kane and bring the WHC to Raw the next night. However, the GM reveals to Miz that the SD title can't be won with the Raw MitB. Miz is stripped of the title, which is returned to Smackdown.
I like this idea for several reasons.
1) Miz would still be able to refer to himself as a former champion, garnering more heat from the crowd.
2) The audience would get a kick out of seeing the Miz's disbelief and powerlessness once he realizes that he has cashed in and lost his MitB shot for nothing.
3)This allows the Taker/Kane feud to continue without the belt, so someone like Swagger or Punk could regain it.
4)Miz now has to work his way to the title legitimately, which puts him over more when he finally wins it.
5)It's an unpredictable ending to a MitB storyline.
The only problem is that it makes the Miz look like an idiot since we've already heard that the Raw MitB is only applicable to the WWE championship.
I like this idea for several reasons.
1) Miz would still be able to refer to himself as a former champion, garnering more heat from the crowd.
2) The audience would get a kick out of seeing the Miz's disbelief and powerlessness once he realizes that he has cashed in and lost his MitB shot for nothing.
3)This allows the Taker/Kane feud to continue without the belt, so someone like Swagger or Punk could regain it.
4)Miz now has to work his way to the title legitimately, which puts him over more when he finally wins it.
5)It's an unpredictable ending to a MitB storyline.
The only problem is that it makes the Miz look like an idiot since we've already heard that the Raw MitB is only applicable to the WWE championship.