Some surgeons would say yes, but I would definitely not reccomend it at all! Crohns attacks the small intestine and other things and the pouches can become greatly affected. I have heard of some people living peaceful with a J-pouch with Crohns but its not worth the risk.
If you need/want surgery get a ileostomy. I know it can be depressing to have a bag, I would know; but look at it as a second chance of life, a chance to have your life back.