Yeah the IW sales might be a small part of the reason but I would bet that it mostly has to do with the MCU/Disney secrecy surrounding the ?Big Thorbowski? before Endgame was released. Apparently if you take a look a the ?lower end? EG Thor merchandise, most companies are playing catch-up with their respective items. It has also been suggested to me that MCU/Disney made sure not to provide licensors with any advance concept materials in order to keep the character change a secret.
I was so confident that we would get an EG Thor release that I put a brand new Mk. L on the line and while my complete confidence has bounced up and down, I am just as confident in the PO today as I was back in May. Yeah the teaser shot boosted it up a couple notches after months of seeing nothing then back down when he was a no show at SDCC/ACGHK. However, my tempered expectations are gone again after hearing that most (if not all) companies with plans to merchandise this version were/are late to the party because they were not getting any advance materials prior to the release of Endgame.
Could he be shown at NYCC in a few weeks, possibly. But if he is missing from the show, I am not going to feel devastated and pulling out a MISB Mk. L in preparation to ship to some lucky bastard. Yeah, NYCC makes the most sense from my standpoint (as well as many other collectors) but it will not feel like a nail in the coffin if he is still undergoing prototype adjustments. I think the most important as well as most difficult thing to get right will be the headsculpt (duh) and has undoubtedly been through more revisions than we will ever know.
Sorry for the rant but my stakes in this PO are high and I was just relieved to hear that MCU/Disney kept him a secret for as long as possible.