"The Flash" TV series spoilers are here and the leaked pilot provided a lot of potential characters that will appear in future episodes, as producers are doing everything they can to set the tone that is very much different from "Arrow."

In a report by Reid Jones of MoviePilot, the leaked pilot episode provided a lot of "The Flash" TV series spoilers by hiding Easter eggs throughout the show, particularly on possible crossovers of DC characters and appearances of the speedster's comic nemesis.

There's the metahuman Mark Mordon seen in the pilot episode who has the ability to control the weather. In the comics, he was known as the Weather Wizard.

The pilot showed how Barry Allen's mother was killed by a flash of light but Reid Jones suggested that the "yellow blob was the most human-looking blob there was."

"If you got to see the episode yourself, you could tell that there was a person in that yellow and slightly red zoom, and that my friends is Professor Zoom (probably not Zoom himself since he didn't come in the comics until later). Either way, we have ourselves a nice little tease at a villain," he said.

A damaged cage shown on the pilot also revealed "The Flash" TV series spoilers as the single tag hanging on the iron rods reads "Grood," which refers to the genius gorilla with psychic powers.

Other DC characters hinted during the leaked pilot episode were The Green Lantern and possibly even Batman himself, MoviePilot added.

Meanwhile, Den of Geek said that, "In terms of tone, 'The Flash' goes to great lengths to establish that it is almost the complete opposite of Arrow. It's a much sunnier show...literally. Mostly, it's daylight in Central City."

"While [the] lighter approach is refreshing, it's a touch squeaky-clean," the website added. "In fact, most of the supporting cast lacks that moral ambiguity or sexual energy that was on display in even the earliest 'Arrow' episodes. This is clearly by design, though."