Its hard to say. The current plan is for all 22 new CRJs to be sent to NYC. That means 110 CAs and 110 FOs will be needed. Less than 50 FOs have been awarded LGA CRJ so far, so theoretically if you were hired today you should have some pretty good advancement towards holding a line. Also, there will come a point when the CRJ replaces NYC ERJ flying to the point where they will have to displace ERJ FOs from LGA/JFK. Some of those senior FOs could chose to move into the LGA CRJ, which would push the newhires down the list

The company could also say, "Lets move 10 of the new delivery CRJs to ORD/DFW" which would reduce the movement in LGA CRJ.