I would hold off on that because we've had people guess that stuff was "confirmed" by outside media before only to have it to turn out false.
Remember when people kept saying we were gonna see the Wasp and Black Cat because they showed up in Disney Infinity?
Well, Disney Infinity had a lot of other spoilers already confirmed with new characters: Mysterio, Jack O'Lantern (his glider as a Power Disc), Ghost Rider (his chain-whip as a Power Disc), Black Panther (his vibranium's daggers)... etc. About Black Cat, there has been some hints about her potential debut in the next series. About the Wasp, I can't say anything, but I would have really liked to see her in "Avengers Assemble".
I'm not sure this would be a good idea. First of all, I think these characters are too new for debuting so quick in the animated series (Agent Venom is little older in comics). And besides, there are a few more problems around here:
+ Spider-Gwen: One of her main traits is the fact that she was one of the most important persons in Spider-Man's life before her tragic death. However, in "Ultimate Spider-Man", there is no counterpart of gwen Stacy and Spider-Man has never met this girl in this reality. So the potential "sentimental impact" in this reality is anulated because there's no Gwen Stacy in "Ultimate Spider-Man".
+ Silk: Not only she's too new, but also because she's involved too much in Spider-Man's history to make her debut now. I mean, through Silk, we should met Ezekiel Sims and all his world. The bunker part is also complicated, and the part where she and Peter were bitten by the same spider. Not to mention the tiny detail that, when they are together, they have the animal impulses of pheromones and stuff.
*Honestly, I would prefer a version of Mary Jane with Spider-Powers, like in "Spider-Island".
And about the "Superior Spider-Junk"... I really gonna be sick!! Bad enough is that I hate this story, but it's even more unacceptable in this series after so many "mind switcheroos" in the series: Wolverine, Hulk, Loki and even Arnim Zola. And sick of this!! Not to mention that, after so many brain switchs, SHIELD could recognize Ock's masquerade instantly. The only way I could accept it is if Doc Ock clones a body of Spider-Man (like Kaine), so we can have Amazing vs Superior.