I suspect they will not do the 700, but who knows. Here's why...

They have inventory and access to the E-170, which has the wide cabin and I'm sure are more popular with the customers.

They also have inventory and access to the 900. If you're going to buy a skinny RJ, at least get the longer one; the incremental cost to go from 700 to 900 is very small.

I guess it's remotely possible that they might replace the 200s with 700s.