I-140 Approved on Feb 2008 with Emp A joined Emp B, Now Considering Rejoin Emp A

[id4any]

Hi Friends,

I have approved i-140 on EB2 catogary with Employer A, I have changed my employer. Now considering rejoin the Employer A.

My question My priority dates are very soon and Can I rejoin the Employer A and file I-485. What are difficulties I may face if I do that?

Looking forward your valuable suggestions.

Thanks