The Free Comic Book Day volume by Valiant for May 7th leads into their 4001AD crossover event, Divinity II, Archer & Armstrong and a great double page spread of the state of the Valiant Universe right now.
And then hits with the teases.
Ending with just one word for 2017.
Those would be the 41st century superfolk who first appeared in Rai and the Future Force #21 and got a mini-series back in 1994 and 1995.
Could 4001AD be about to shake them out of retirement?