Atlantic going isn't the end of the world, yes it's an airline to cross off the list on Wiki but at the end of the day they carried 40-odd pax twice a week for 3.5 months of the year.
On the plus side, over the same period Iceland Express are coming back, so 2x A320s replacing 2 Avros. Plus the 3 weekly Wow Air.
Also on the up is Turkey. Pegasus more flights than last year, Anadolujet 4x weekly Ankara returning, Sky to Gaziantep returning, and the new Atlasjet to Antalya.
Also of interest, though it's one that you can't rely on until it's on sale and actually operating, is Mokulele Airlines of Hawaii, who have got approval from the US DOT for charter flights to Honolulu via Chicago Rockford. An ATI 767 supposedly been secured to fly it.