spreilly wrote on Jun 27^th, 2021 at 11:43pm:

The 737 has me pleasantly surprised so far at how well of an aircraft it is. I’d love to be able to use it to do some Bahamasair flying. Any updates on the -400 or -500 expansions?

I don't think you'll see a -400 or -500 this year for sure....most likely not even next year, unless the porting of Pd3 models to MSFS dries up. 
CS is working on the 777F for MSFS right now.  The big question is what model will be next?  I'm guessing the 767 as its the most recent and there is already a 737 in MSFS.  Then the 757, then the 737, L1011, 727, 707, B52, etc.
So if they follow that path of releases, its gonna be a while for other platform's products.