JetBlue TrueBlue - Increased BTV to JFK frequency?

I was pricing out a fare for a few months out and I noticed that jetBlue is now listing an extra flight each way after April 19. Flight #870 leaves JFK at 9:45 PM and arrives at 11:05 PM, and flight #869 leaves BTV at 7:10 AM and gets in at 8:20 AM. I don't remember B6 announcing another BTV roundtrip...did I miss something? The fares are also priced much higher than any other departure on every day I checked. I'm assuming this is because it isn't an officially announced route yet and they are discouraging people from booking on it. Does anyone know if these flights will be on 320s or 190s? It's been a while since I've seen a 190 at BTV but I really do like the planes.

It looks like an A320.
Cheap fares have not yet been released.

Oddly enough, my post before this got deleted, where I added that 3 out of 4 DL flights on BTV-JFK are RJs as of April, and it's nice to see someone from BTV.