I think the poster copy is being misinterpreted - the copy is distinguishing between the IMAX show and the series. Even if they did decide internally to cancel it, I don't think they would announce it before it premieres.
The Epicstream article linked above cites a source (Renew Cancel TV) that is speculating it is done, but Epicstream states it definitively. I don't see the industry or mainstream press reporting this.
Premiering Inhumans on IMAX was a big mistake. The move raised everyone's expectations of a network T.V. show to the level of Marvel's cinematic releases. Which suggests that the execs in charge of Marvel's T.V. stuff aren't even paying attention to their own product. They probably think Agents of SHIELD would be as successful as Guardians of the Galaxy, if given a bigger FX and marketing budget.
Edited by Joe Zhang on 21 September 2017 at 7:18pm