Scribblenauts: Fighting Words (cancelled iOS adaptation of video game series; 2014-2016)
Scribblenauts: Fighting Words was supposed to be the iOS adaptation of Scribblenauts but was cancelled by Warner Bros, resulting in 45 employees of 5th Cell, the game's developer, to be laid off. It was the working title  of a mobile game planned as part of the innovative Scribblenauts franchise, which allowed players to conjure solutions to problems by typing any word that comes to mind.
Plot and Gameplay
"Scribblenauts Fighting Words is a free-to-play, word-puzzle mobile game from 5TH Cell and Warner Bros Interactive Entertainment. Use your creativity, command of the keyboard, and the magic of Maxwell's notebook to battle creatures across the Scribblenauts universe, recruit characters with their own unique abilities onto your team, and save the world from the devious mind-controlling Blugs." (Description from beta website, screenshot courtesy of @Steel_Beaver on Twitter)
Development and Cancellation
Scribblenauts: Fighting Words was being developed by 5th Cell for iOS devices. Development started in 2014, and the game was due to be released in 2016.  The gameplay would have involved typing up any object that comes to mind in order to solve puzzles, similarly to previous entries in the series. However, after nearly two years of development, Warner Bros. cancelled the game for unknown reasons, resulting in 45 of 5th Cell's employees being laid off, including lead animator Tim Borrelli.  Shortly before the project's cancellation, 5th Cell allowed gamers to sign up for the beta release at https://scribbeta.wbgames.com/, meaning that work on the game was likely almost done before WB pulled the plug. Despite this, no footage or screenshots of the game were made publicly available. Unfortunately, The Wayback Machine does not have the beta sign up page archived. It is unknown if the game was going to be released on Android devices, like the other mobile adaptation, Scribblenauts Remix, as well as the mobile version of Scribblenauts Unlimited were.
Finding the Beta
In a Twitter post, @Steel_Beaver says an e-mail link was sent to users who signed up for the beta to download it. Anyone who downloaded the beta and played it can perhaps release the files or some footage so we can see the game if they still have it. If that is not possible, perhaps WB Games or 5th Cell and its employees can be contacted for more info.
Also, in late 2016. An Instagram user previously known as Aidan (their username is now super_the_cool) Posted a picture of the menu. It can be seen in the gallery below.