I don't see why it wouldn't be. Shazam's in that story. I think they've probably retconned that his New 52 family was always his foster family and that Billy was always called Shazam and not Captain Marvel, but other than that things from before Flashpoint should be canon again, which explains Sivana's look.
His name is actually Super-Man, which is supposed to be the Chinese Mandarin translation of Superman and just written in English for the convenience of the readers. His name is really 超人, Chāorén. Which you can see on his comic's logo.
Shoes has the wrong debut issue listed there, she debuted in the last Catwoman issue before Future State, not in Future State: Catwoman #1.