Besides the fact that a SPIDER-Man reference in an ANT-Man movie would be ironic and hilarious when you think about it, Spidey being referenced in this year's Ant-Man movie makes a lot of sense. With the character set to appear for the first time ever in the MCU in 2016's [Captain America: Civil War](tag:994409), without an origin story no less, having the presence of the web-slinger known before the big showdown would give us some time to get used to Spider-Man actually being a part of the Marvel Cinematic Universe.
Unfortunately, this newest rumor (fresh from the pot) doesn't tell us if we'll actually see a Peter Parker easter egg or not, but we might get the next best thing.
Latino Review posted an unconfirmed rumor that if true, means that Spider-Man won't be the only one joining the MCU after the Sony/Marvel deal. According to LR, Darren Cross (played by Corey Stoll), the villainous antagonist of Paul Rudd's Lang, is attempting to sell the Yellowjacket weapons technology to other corporations.
First is the Ten Rings, an evil corporation that made its MCU debut back in Iron Man. We haven't heard much about the Ten Rings since, so having them referenced now might assure us that Marvel isn't done with the evil corporation yet, and may even have plans for them in the future.
Then again, it could just be a simple name drop, and then the TR will go back to doing absolutely nothing.
Next is Roxxon, the evil corporation that's been stirring up trouble in the MCU since the beginning! Seen in all three Iron Man films, Agent Carter, Daredevil and more, Roxxon is the definition of 'nefarious corporation'. Well, one definition anyway...
The better definition is Oscorp! Yep, Ant-Man may just reference Spidey's biggest baddie of all, Norman Osborn and his evil corporation, Oscorp!
This doesn't necessarily mean we'll be seeing Norman himself in the film, but I wouldn't be surprised if the movie referenced some of Oscorp's notable experiments and "accomplishments" like, oh say—genetically enhanced spiders!
Now remember, this is still a rumor, but if it turns out to be true, I'm all for it!
Source: Latino Review