Based on the fact pattern that you provide it is pretty clear that there is immigrant intent and there are significant risks if you do this. I would advise you not to. I don't think any immigration lawyer can ethically advise you to have her enter the US on a B-2 with the intention to file for adjustment of status shortly thereafter. First there are preconceived intent and fraud issues which could lead to her having to apply for a waiver under Section 212(i) of the Immigration and Nationality Act. In order to get this waiver you would have to prove that her absence from the United States would be an extreme hardship to you. That is a very high burden of proof to meet. I suggest you consult with a lawyer and discuss your options. The F2A category likely won't be current for a long period of time. It may not be current in September.
I agree with my colleague that there appears to be clear immigrant intent. This can lead to serious consequences including a finding she is inadmissible for fraud and/or material misrepresentation. This is a permanent bar and can only be waived by demonstrating you will endure extreme hardship if she is not allowed to remain in the United States. I would add that the extreme hardship inquiry looks at the hardship you would face living apart from one another as well as if you were required to live abroad with her. As you have been out of the U.S. for the past several years, this may be difficult for you to substantiate. You should consult an experienced immigration attorney to determine what other options may be available for your wife.
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You have not provided sufficient information to allay attorneys' fears that your LPR status would not be revoked upon returning to the U.S. In addition, it is unlikely that any attorney would suggest that you she should come to the U.S. on a non-immigrant visa and adjust status upon arrival. While some people get through with it, there is the strong possibility of extremely negative consequences if you she commits to such a course of action.
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