Right now the Roster is 17 Characters not including alt characters. The treasure box supposedly has 25 character cards so here are my guesses
OC 2 (3) Rowan, Lianna (Dario kinda expected)
SD 1 (5) Marth (Caeda, Tiki, Navarre, Draug)
Awakening 6 (7) Chrom, Robin, Lissa, Frederick, Lucina, Cordelia (Tharja)
Fates 8 (10) Corrin, Xander, Camilla, Leo, Takumi, Ryoma, Hinoka, Takumi (Azura, Sakura)
Alt Characters 1 (2) Femrobin (Male Corrin)
SD is annoying because alot of characters come in pairs or are swordies in a heavy swordie based game. If the alt characters get cards RIP Navarre and Draug