I predicted the announcement of an LCC going Intl a couple of months back. Here's may 'guess' on the new planes;
Because this a/c really does look and feel like one of the big boys, you'll see the companys' using them grow like wildfire.
Here's the twist. The commuters won't get any! Only the LCC' and one or two legacy will have them. On the plus side, the LCCs' will start hiring like mad from the commuters, while the legacys' will spend many years syphoning through their furloughed boys/girls. Pay will be slightly lower at the LCCs', but still much higher than commuter pay. While Legacy pay will be lower than even the LCC's.
Eventually, they will meld into LCL's-Low Cost Legitimates
