I am on L-1A with an approved I-140 in EB1c. My priority date is not current yet. What are the options if they were laid off.

Unfortunately, the approved I-140 EB1C is no help here; for you to be able to stay past your 60 days grace period, you will need to get sponsored for another work visa (likely the O-1 but you need to have a discussion with an attorney) or file an application to change your status to B-2 visitor status during the grace period.