In the future Penny will marry an older version of Dash.
Penny has a special relationship with Bolt.
Penny received a name change at some point and was at one point an actual superhero named Veil.Seriously, Veil looks exactly like an older version of Penny.
Alternatively, she received a name change when younger and Penny's old name was Grace Goodwyn.As above, Grace looks like a younger version of Penny. Then again Penny Forester could be a fake name so it could be her actual name. It could go either way.
Rhino actually does have superpowers.They might be of the Charles Atlas Superpower variety, but he's been shown to keep pace with trucks on the highway and drag ladders around by himself with nothing more than his hamster ball. That's unusually fast and strong for a hamster, even one as big as Rhino. So how is he managing that?