The ABC pilot - based around spy organisation S.H.I.E.L.D. - will be co-written by Whedon, his brother Jed and Maurissa Tancharoen.
"The important thing to me is that we know what the show is," Whedon told Vulture. "We love what it is. It came together very organically."
The writer/director added that the S.H.I.E.L.D. pilot will contain "some really dope notions".
"It's going to work very well for people who either love the Marvel Universe or for people who've never dipped a toe in the Marvel Universe," he confirmed.
Whedon previously claimed that S.H.I.E.L.D. should not be considered a traditional spinoff, since it is "autonomous" in relation to the Avengers film franchise.
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Watch a clip from The Avengers below: