If she never returns to the USA, her green card will be deemed abandoned. In that case, you won't have to do anything. However, you can send a...

Want to go home asylum pending how ?

There should not be any problem at the US airport. If anyone asks just tell them you are abandoning your asylum application and returning home.

Will this affect my L1 A visa renewal?

Since you and your wife are both non-citizens (or even legal permanent residents) her status could potentially affect your status, although how...

Four years and nine months is the earliest you can apply without using the marriage as a basis.

Yes, this may be an issue. Be prepared to have a solid explanation ready for this situation.

Does having a cosigner slows down the status adjustment process?

It should not have any effect, provided the forms are completed properly.

Your situation does not look very good but it's difficult to respond without more details. Contact an attorney and discuss your situation in...

I would be completely honest when you complete the forms. Serving in the US Military will help your application not hurt it.

How long till I get an interview date?

Things are a little backed up at the moment. I would wait another 30 days before contacting the USCIS and setting up an InfoPass appointment.

Do I need to file I-485 supplement A, I came on an F-1 visa, hasn't expired yet, but I never attended the college. I am married?

You do not appear to have a need to file the Supplement A. You should be able to adjust status since you entered legally.