Don't know muchabout it, then write your own. The name itself lends well to GM creativity. A Secret Crisis doesn't leave to much for GM development true. It has to be secret and apparently a reality shattering event (RSE). Best case scenario there are a virus, magic, time travel fun. or alien invasion that has to be met and defeated before it hits earth. That way exactly how everything changed is tailored to your campaign. Perhaps the event itself causes the birth of new heroes an villians, etc.
Barring that route stick with the intent of the crisis and substitute another RSE of your choice. There are so many ways to destroy a continium, or at least alter it significantly.
You could also ignore the RSE ifm for examplem the original CU history never happened in your campaign.
That's all I can think of at them moment.