For Marvel Series 86 is based on a 1990s storyline, and has two new characters, plus one who has only been done animated. Series 87 is an 80s storyline allegedly mutant related, and has two new characters again, plus one in a new outfit that is very different from the one we have. Is likely Inferno.
new characters: N’Aistra or however you spell it. The new outfit character is probably Illyana but could be a red herring for Maddy or Cable.
I could see:
Dark Child (Silver Armor)
Goblyn Queen (Tamer)
Naistra (those Demon wings from DND)
Sym
Goblin Wolverine’s Dad
pack in baby Cable in a telekinesis bubble like dungeon master. Although I’d prefer Gateway.