We're years away from X-Men, Fantastic Four, and a new wave of Avengers films... and apparently what that means is we're in for years of Venomized Deadpool who is also a Zombie and is wearing Iron Man armour.
It's not as though the Avengers films were the only Marvel thing they were making toys ofprior to this. They'll almost definitely be doing figures for the various Disney+ shows if The Mandalorian is any indication, plus whatever other Marvel films are out in the meantime.
They seem to be doing more business than ever so I doubt them going out of business is anywhere on the horizon. This forum is not representative of all collectors, and indeed the North American market as a whole surely is not the majority of their business.
Particularly on a DC sub-board where there are likely some fans who are upset that DC isn't as popular as Marvel at present. I've got zero interest in all the Iron Man or Spider-Man variants but it's obvious those are extremely popular characters and that there's some sort of market for them. Let's be real, if the shoe were on the other foot and DC were the powerhouse yearly movie franchise, they'd absolutely be milking the **** out of Batman and Superman variants.