Episode 8 is much bigger than Rogue One all day long. There will be at least 8-10 new TLJ toons. They will not ignore it. But, they need to also not release a bunch of weenie toons. Bodhi Rook was one thing, but I doubt they want to release more Bodhis. They did what they could with such a minor character, but having possibly two new capital ships and commanders (Holdo, Snoke), plus at least three more Resistance toons from the entire movie, and then FO which could supply six more toons, I say we have a lot to look for.
Plus possibilities for a new trilogy raid, to get some very strong toon like a new Finn, or maybe Maz if they make her badass. I mean, some people knocked the scene she had, but she was a FREAKING BADASS! She would be great in this game, kind of like a different, blaster wielding version of Grand Master Yoda.
They need at least three solid, very well balanced strong toons from their upcoming crop, and at least Rey Jedi Training is very very good, so it's a positive sign.
FOE may seem weak, but in the right type of FO dominant squad, he's a monster.
So far, so good. We have almost all of the major toons from Ep 7, we might get another version of Leia, and both of hers are spectacular in their own ways. She'd have to be strong, if not meta, at least a contribution to the meta team compositions like Raid Han, Thrawn, Nihilus, or Gen Ken, and now CLS, RJT.