Ice detenion

Since you have an attorney, you should discuss with your attorney.

You may only have H-4 and EAD on H4 if your spouse has H1B.

If the matter was abandoned you will have to start over. If not you may continue.

L1 extension and L2 EAD renewal at the same time?

Yes you may file concurrently. Your spouse cannot be approved until you are approved

Immigration status after being laid off when extension is pending?

When your status ends which is the earlier of several possible events including being laid off.

I have a 2 years green card. Can I still apply to remove the condition on my green card after my wife had a baby by another man?

Yes it is possible using the good faith exception after divorce is final. Contact an immigration attorney early in the process (now).

Do you need to file the I130 again (continued)?

Yes you need to start the process over

Starting over?

Yes you need to start the process over

What can I possibly do to remain in US when my husband divorces me while my AOS is still on the process?

You should consider speaking with an immigration attorney to pursue a VAWA filing.

To return you will need advance parole. It is unlikely you will receive advance parole in time for your planned trip