If I am correct, The Walking Dead has only taken place on the eastern coast of the US. This is great and all considering I live on the east coast and I can relate to the environment. I have a feeling that we will eventually run into repeat scenarios with repeat character traits. The best way I see to combat this and to keep the franchise going is to show the audience what is happening in other parts of the world. The zombie apocalypse is happening world wide and seeing how other countries and cultures around the world would be an interesting twist in the story telling. They should start back at the beginning of the outbreak. I was a military brat growing up (NAVY!!!), so this would be my dream scenario. It would help transition the zombie outbreak from the US to another part of the world.
You start out with either a military member or a family at the base in Georgia, USA. On the day of the outbreak, you are preparing for your plane trip to a US military base over in Europe (probably Italy more than Germany). Your flight takes off just as the zombie outbreak is occurring. You make it to your plane and you make it out just as panic, pandemonium, and chaos fill the air base. On the long flight over, you notice that communication with air traffic controllers stops. As you make it to the country you are headed to you can see from above that everything is in shambles. Fires exist throughout the town near the military base and you can tell that people are running away. As you land at the base, your colleagues fill you in on what is happening and assure you that you are safe on the base. In a matter of a couple of weeks, food quickly becomes low and fear consumes the minds of the survivors on base. Chaos soon takes over and the walkers begin to invade the base. Now you and others from the base must survive the zombie apocalypse in an unfamiliar land with unfamiliar people and, of course, zombies.
This can help show how other people in the world are reacting the outbreak and could also provide a backstory to how the zombie apocalypse spread. Maybe the zombie outbreak only occurred in the US for the first couple of days. The rest of the world could have first thought it was just a US thing until their own people started turning. This can bring added tension between people originating from the US and people of other countries. There could have been a mass exodus out of the US but governments and people from other nations turned US people away, citing them as the blame for the zombie apocalypse. This also fit in with my dream scenario. Tell me what you think about my theory or if you have any The Walking Dead: International theories of your own. I truly believe this would be a great story shift when the Clementine story arc closes. I'm not saying she'll die, just we'll have to find some sort of closure to her story so we can move on to more perspectives of the zombie apocalypse (she's a big girl, she can handle herself).
PS: Congrats if you actually read all of this! :)