Well, and also, so much of the Marvel Universe has been made now. They're getting more and more niche as time goes on. They've got to really weigh the investment on what options they have left. They aren't going to produce some gigantic Haslab scale Fin Fang Foom, and they seem to want to avoid multi-packs (though I think there's a gold mine there for stuff like Warriors 3) so your field of characters that are large enough scale to warrant a MTO, but popular enough to warrant production costs (with the returns Hasbro will want) is narrowing.
Like, I think there's still gas in the tank for some stuff, but every idea I have is a little bit more unlikely than the last. I still think a Fantasticar is probably a good bet for MTO, but it's hard to tell what lessons they learned after EoV.