AU for Part 2. After Doc finds the DeLorean has changed in a weird way, he gets Marty and Jennifer to help him investigate. However, things take a turn for their worse when it seems 1985 has become a bizarre Biffhorrific reality. Can the 3 of them get back in time and restore their own present, or will they be stuck in a nightmare world forever?
Doc, Marty Junior, and Suzy end up in a Tannenized 2015. Doc and MJ must go back to 1985 to fix the mess. However, things get complicated when their actions in 1985 start erasing Marlene from existence and Doc goes to 1914. Now, Marty Junior needs to save Doc from being killed in 1915- but many crazy events delay their return to 2015.
Marty Jr. and Marlene have to head back to the Old West to rescue Doc and Suzy - but they realize that their father and Doc's father are there, and Marlene gets into a fight with Buford Tannen! Will they ever get back to the future or not? .