Not surprising given everything else they've botched and their complacency. Especially the complacency. Parks with Animal Kingdom level attendance should not be getting new rides effectively once a decade. And unless something gets announced soon, Disney seems perfectly content to counter Epic Universe with *checks notes* the Splash Mountain retheme.
I will say, they seem to have an exciting comprehensive plan for Disneyland Resort, and I do think Spider-Man will be a pleasant ride. But just as Smuggler's Run buckled under the weight of expectations brought on by Rise, so too will Spider-Man have to carry the expectations of the Avengers, and for much longer.
EDIT: And if it's gonna take till 2025, maybe they should try to throw something together in the Art of Animation building. If Pets can fit in half an acre, surely they can retrofit a neat dark ride into a 1-acre warehouse.