Peety, that will not cure IBD, it's our faulty immune system that causes the disease to specifically atttack our intestines, so simply replacing the intestines will not ever work, you have to minipulate the immune system (this is why intestinal transplants don't work either)...stem cells to clear out and re-boot our faulty immune system is a logical and likely cure for IBD.
And it's already in the makings, there are test subjects with IBD that have gone through this, now it's a matter of "time" to see if it can actually be considered a cure and not just a long term remission.