On TLC at 2011, Daniel Bryan cashed in his MITB briefcase to win the World Heavyweight Championship. He would then retain it successfully in a few matches, going on to defend it at Wrestlemania 28.
On RAW after Survivor Series 2010, The Miz cashed in his MITB briefcase to win the WWE Championship. He would retain on RAW's and PPV's going on to defend it at Wrestlemania 27.
So far, statistically, wrestlers who have gone to cash in late in the year have been able to keep the title going into Wrestlemania. Kane cashed in on the same night he won and went to being in a 4 on 4 tag match at the following Wrestlemania. Del Rio cashed in on the SummerSlam after and missed Wrestlemania, probably would have been a part of Team Teddy vs. Team Johnny.
The only fear is that if Ziggler cashes in on January, he wouldn't likely defend it at Mania. Not only in MITB statistics, but in Ziggler's career statistics on January. Edge lost the following PPV and went to face Foley at Mania 22. Ziggler was awarded his first World title after Royal Rumble to then lose and get fired the same night, going on to be stuck in the dvias vs celeb divas mix tag match.
He's also 0-2 for World/WWE title matches, but hopefully the MITB cash in statistic can win over it this time.
Now, yes in WWE statistics are just for the kayfabe, but this is a good chance for Zigglers career to me. He's feuding with Cena right now, and it doesn't even matter if he wins, because he has the briefcase and a clean win on Orton in Survivor Series. Edge lost to Flair in New Years Revolution before cashing in on Cena. Miz tapped to DB twice and losing a belt before cashing in on Orton. So I have high hopes for Ziggler. Debate if you want.