H1-B Transfer with approved I-140 in 6th year

[sridyada5]

I'm currently in 6th year of my H1-B with employer A. I also have approved I-140 from employer A. Now I want to transfer to company B. Company B is willing to transfer based on my approved 1-140 for 3 more years. Company B will start my GC process after 6 months. By then, I will be in 7th year of my H1-B. If company A revokes I-140 after transfer is completed, will that transfer become invalid since i'm in 7th year of H1-B with employer B? i'm not concerned with the priority date of previous employer's GC process. I want to start GC process all over again with employer B.

Please suggest.