Yes, if your new employer is willing to rehire at some point. However, if you do not want to work with the old employer, you cannot or you will committing fraud. You have no other options, go back with old employer
I agree with my colleague. You should also consult with your old employer's immigration attorney and get a second opinion from another immigration attorney. Good luck.
Mr. Lorenzon's answer to your question does not establish an attorney client relationship, but rather is meant to share knowledge with the general public. For specific advise on your case, you need to consult one on one with an immigration attorney. Mr. Lorenzon can be reached at 216 573 7322 or at firstname.lastname@example.org. All initial constulations are free.
Both you and the old employer must have a good faith intent to resume the employment indefinitely (and not just to get your green card). That intent may be determined by circumstantial evidence. For example, if you returned to the employment now, and then quit as soon as you received your green card, the USCIS might conclude that the employment was not in good faith.
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