I'm sure he'll come in shape, he learned his lesson against Austin when he came in about 10 lbs over his norm and got a draw. He knows evander is ready for 12 hard rounds.
The story I heard is like ten days before the Austin fight Ibragimov's trainer disappeared and Ibragimov didn't even train for over a week leading up to the fight. He just indulged in food and visited with friends. Supposedly this is what led to Ibragimov changing trainers.
Everybody making a big deal out of this or drawing parallels to Holyfield's shape and insinuating that these things will affect the outcome of their fight needs to realize that Sultan didn't look like a Greek god in his last fight but still kept an unimpeachable workrate over 12 rounds with his mouth closed. Evander would kill him in a beauty pageant, but that means nothing in the ring.