current cutoff time for NIW is Jan 2006. better submit EB1-485.

Can not inter-link them at this moment since your NIW 140 is pending.
Also no one can gurantee next month EB2 will move on. What's the benefit to keep an Eb1 in your pocket? you better want to take the Eb1 advantage.
as 塞外飛寒雪 mentioned GC is approved based on visa bulletin and that's certainly true. Even your 140 gets approved later and NC clear quick, no way to get your GC this month or next month. You have to wait till visa cutoff date moves to March 07, your PD.