We now have a pretty good idea of what the running length of episodes for series like 'Loki', 'Wandavision', 'The Falcon and the Winter Soldier' and 'She-Hulk' will be. We also know how long we can expect the series to be.

Kevin Feige, who is head honcho at Marvel, revealed all to Collider. He said that fans can expect the superhero series making their way to Disney Plus to either run for nine or ten episodes of 30 mins in length, or fewer episodes with a longer running time.

"Well, we're looking a little differently," Feige said. "We're looking at it as developing them as either six hour-episodes, or nine or 10 half-hour episodes.

"So, for instance, 'WandaVision' started that way and 'Falcon and the Winter Soldier' as 30 minutes, but because it's streaming, it's Disney+, and the rules have blurred over the years, yes. Some can be 23 minutes. Some can be much longer than that.

"But 'She-Hulk', for instance, is being developed as 10 30-minute episodes. Some will be longer and some will be shorter. 'Loki', 'Falcon and the Winter Soldier' is being developed as six 40-50-minute episodes."

He also added that the upcoming 'Moon Knight' will fall into the six, 40-50 minute episode category.

However there's no word yet on episode length for the likes of 'Hawkeye', 'Ms. Marvel', and 'What If…?'

Feige also spoke to Variety about whether audiences can expect multiple seasons of upcoming Marvel Disney+ shows.

He said "it will vary", noting that some will have just one season while others will with "a couple of years between" their production. A few are "being built with multiple seasons in mind".

Feige stated: "There are some shows that have been built to further expand our storytelling and then go into features. We've already announced [Elizabeth] Olsen being a part of 'Doctor Strange 2'. We've announced ['WandaVision's Monica Rambeau actress] Teyonah Parris being part of 'Captain Marvel 2'."

He continued: "There are some shows that, while always interconnected, are being built with multiple seasons in mind.

"So it’ll vary the way a lot of I think great TV now varies, whether it’s a couple of years between seasons of 'Game of Thrones' or 'Stranger Things,' or one offs like — what did I just watch? — 'Queen’s Gambit.'

"One of the fun things about streaming is the rules are loose, which allows for you to just follow creatively, where you want to go."

The first two episodes of 'Wandavision' premiere on Disney+ this Friday (January 15).