Warning: Full "Game of Thrones" spoilers ahead. If you did not watch "The Lion and the Rose" do notread any further.
The Purple Wedding continues the streak of shocking "Game of Thrones" events. In the second episode of "Game of Thrones" season 4, "The Lion and the Rose," Joffrey was killed and Tyrion was accused of the murder by Cersei. Needless to say, the shocking death of Joffrey Baratheon will be the topic of interest for all "GoT" fans but what will happen to the Lannisters? Joffrey's uncle, Tyrion, is accused of the murder by Cersei and there is no king to sit on the Iron Throne.
The death of Joffrey creates a power vacuum and Margaery Tyrell once again becomes a queen without a king. If there is one thing we know about the Lannisters it is the fact they are resourceful. Joffrey's death will affect them on a personal level but surely Tywin must be thinking about what is next for his family. Tywin must have known Joffrey would eventually become a problem for the family so he may actually be relieved his grandson was murdered. As for the Lannister siblings, Tyrion is accused of murder while Cersei is surely planning revenge for the death of her son. Jaime had a falling out with his father but the death of his son, from his incestuous relationship with Cersei, may help mend the strained relationship with Cersei and Tywin.
The biggest question following the death of Joffrey will center around the next king. Joffrey has a younger brother, Tommen, but will be too young to actually rule. An older Tommen was recast for the fourth season of "Game of Thrones" which means the character could play an important role in the aftermath of the Purple Wedding. Tommen is the same age as Bran Stark, in the "Song of Ice and Fire" series the character is around nine years of age at the time of Joffrey's death. Because Tommen is too young to be king, that could lead to Tywin gaining more power or Cersei returning to her role as queen regent.
No matter what happens next, the Lannisters will do everything they can to remain in power and keep the Iron Throne. If the Tyrells want to force the issue, they can push for Tommen to marry Margaery. The Tyrells have been the biggest allies to the Lannisters, in terms of money and military support, and Tywin might find it hard to say no to Oleanna, the Queen of Thorns.