Source: Wrestling Observer Newsletter
The January 7th episode of RAW with The Rock's return and Ryback vs. CM Punk is said to be an "all hands on deck" show with virtually every major big name being called in.
Then, WWE has the big RAW 20th Anniversary show on January 14th where they will be bringing several old names back. They may to bring back some names we don't see too often since some just appeared on the recent Slammys episode. Being in Texas, appearances by The Undertaker, Steve Austin and Shawn Michaels are likely. It's also expected WWE will make the first Hall of Fame announcement that night.
For what it's worth regarding the January 7th episode, it's said that when the show is over, "people will be talking."