I have to say, Shovel Knight is one of the best games I've ever played in my life. It's an 8 bit throwback that not only actually stands up to the 8 bit classics of yesteryear, but it would legit be considered one of the all time greatest games ever made if it were released on the NES in 1990 rather than modern platforms in 2014. Although I didn't enjoy it quite as much, I still loved the Plague Of Shadows expansion and its unique play style. I have yet to play Specter Of Torment, but I plan on downloading the Treasure Trove on Switch very soon.
So with that in mind, the King Of Cards expansion might just be my most anticipated upcoming indie title at the moment. A Hat In Time would be up there if it were ever announced for Switch, but running on Unreal Engine 3 makes it highly unlikely that will ever happen. I can still get on PS4, but I wouldn't be able to play it as much as I would on Switch due to the PS4 being my brother's.